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TRMM PFM Operations

2000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1999 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1998 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The above tables identify key operations during each day of the month and contain:

  • Day of the month and day of the year.
  • The primary scan mode for each day.
    • Cross Track - elevation scan plane normal to the orbit plane
    • Along Track - Azimuth plane coincident with orbit plane during elevation scanning.
    • Unrestricted Biaxial - Azimuth plane rotates bidirectionally through 180° during elevation scanning
    • Restricted Biaxial - Azimuth plane rotation restricted when solar beta angle less than 16°
  • Beta Angle - the angle between Sun vector and orbit plane calculated at noon Universal Time [UT]. Values are positive when Sun is on left side of orbit, looking down range. Terra spacecraft is in Sun-synchronous orbit. Predicted range of beta angle values is 11° to 28°.
  • Calibration time in hours, and minutes, UT.
    • Internal calibrations with the blackbody and shortwave sources.
    • Solar calibrations with the Mirror Attenuator Mosaic at either sunrise or sunset.
    • Special operations such as ground overflight campaigns.

 
March 2000
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 32 In Survival Mode 18.00 -- -- -- Maximum Beta Angle for cycle.
2 33 In Survival Mode 18.00 -- -- --
3 34 In Survival Mode 17.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
4 35 In Survival Mode 16.00 -- -- --
5 36 In Survival Mode 14.00 -- -- -- UTCF value adjusted.
New UTCF value = 31535996.850149 seconds.
6 37 In Survival Mode 12.00 -- -- --
7 38 In Survival Mode 9.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
8 39 In Survival Mode 6.00 -- -- --
9 40 In Survival Mode 3.00 -- -- -- Spacecraft yaw maneuver - 23:40:51 UT, +X to -X forward.
10 41 In Survival Mode -1.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
Beta changed (+ to - values).
11 42 In Survival Mode -5.00 -- -- --
12 43 In Survival Mode -9.00 -- -- -- UTCF value adjusted.
New UTCF value = 31535996.849360 seconds.
13 44 In Survival Mode -13.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
14 45 In Survival Mode -17.00 -- -- --
15 46 In Survival Mode -21.00 -- -- --
16 47 In Survival Mode -25.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
17 48 In Survival Mode -29.00 -- -- --
18 49 In Survival Mode -33.00 -- -- --
19 50 In Survival Mode -36.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
20 51 In Survival Mode -39.00 -- -- --
21 52 In Survival Mode -42.00 -- -- --
22 53 In Survival Mode -43.00 -- -- --
23 54 In Survival Mode -44.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
24 55 X -- -- -45.00 -- -- -- Power on 21:26:00 UT.
Minimum Beta Angle for cycle.
See expanded comments
25 56 X -- -- -44.00 -- -- --
26 57 -- Safe Mode -42.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
Instrument safed.
AB async testing
27 58 X -- -- -40.00 -- -- -- AB async testing
28 59 X -- -- -37.00 -- -- -- AB async testing
29 60 X -- -- -34.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
February 2000  
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 61 X -- -- -30.00 -- -- -- AB async testing
2 62 In Standby Mode -26.00 -- -- -- AB async testing
3 63 X -- -- -22.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
4 64 X -- -- -17.00 -- -- --
5 65 X -- -- -13.00 -- -- --
6 66 X -- -- -8.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
7 67 X -- -- -3.00 -- -- -- Spacecraft yaw maneuver - 23:25:17 UT, -X to +X forward.
AB async testing
8 68 X -- -- 1.00 -- -- -- Beta changed (- to + values).
AB async testing
9 69 X -- -- 6.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
10 70 X -- -- 11.00 -- -- -- AB async testing
11 71 X -- -- 15.00 -- -- -- AB async testing
12 72 X -- -- 19.00 -- -- -- UTCF value adjusted.
New UTCF value = 31535996.848502 seconds.
Orbit Adjustment (Delta V maneuvers)
AB async testing
13 73 X -- -- 23.00 00:27:00 -- -- AB async testing
14 74 X -- -- 26.00 03:53:00 -- -- AB async testing
15 75 X -- -- 29.00 01:13:00 -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
16 76 X -- -- 31.00 01:36:30 -- -- AB async testing
17 77 X -- -- 33.00 -- -- -- AB async testing
18 78 X -- -- 34.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
19 79 X -- -- 35.00 -- -- -- Maximum Beta Angle for cycle.
AB async testing
20 80 X -- -- 34.00 -- -- -- AB async testing
21 81 X -- -- 33.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
22 82 X -- -- 31.00 -- -- -- AB async testing
23 83 X -- -- 29.00 -- -- -- AB async testing
24 84 X -- -- 26.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
25 85 X -- -- 23.00 -- -- -- AB async testing
26 86 X -- -- 20.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
27 87 X -- -- 16.00 -- -- -- UTCF value adjusted.
New UTCF value = 31535996.847522 seconds.
AB async testing
28 88 X -- -- 12.00 -- -- -- AB async testing
29 89 X -- -- 8.00 05:06:30 -- -- Orbit Adjustment (Delta V maneuvers)
AB async testing
30 90 X -- -- 4.00 -- -- -- AB async testing
31 91 X -- -- 0.00 -- -- -- Spacecraft yaw maneuver - 05:12:21 UT, +X to -X forward.
Beta changed (+ to - values).
AB async testing
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 60 In Survival Mode -13.00 -- -- --
2 61 In Survival Mode -9.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
3 62 X -- -- -4.00 -- -- -- Power on 03:03, Normal X-track [Az = 180 degs] 04:59,
X-track at az = 243.66 deg 08:59 [ScaRaB comparisons], Power off 10:40,
Power on 19:19, X-track at Az at 243.66 deg 21:01.
4 63 X -- -- 1.00 -- -- -- Spacecraft yaw maneuver - 03:20:57 UT, -X to +X forward. Beta changed (- to + values).
Normal X-track [Az = 180 deg] 01:52, Power off 07:47
5 64 X -- -- 5.00 -- -- -- Power on 02:26, Normal X-track 03:53, Power off 08:19,
Power on 18:31, X-track at az = 243.66 deg 19:38.
6 65 X -- -- 10.00 02:44:12 -- 00:43:10 Special internal calibration. Orbit Adjustment (Delta V maneuvers)

Normal X-track [Az = 180 deg] 01:18, Power off 07:00.
7 66 X -- -- 14.00 -- -- -- Power on 01:29, Normal X-track [Az = 180 deg] 02:29, Power off 08:01, Power on 22:39.
8 67 X -- -- 18.00 -- -- -- Normal X-track [Az = 180 deg] 00:24,
X-track at az = 243.66 deg [ScaRaB overlap, Sun-avoidance commanding] 09:24,
Normal X-track 13:27, Power off 13:28.
9 68 X -- -- 22.00 -- -- -- Power on 00:32, Normal X-track [Az = 180 deg] 00:41, Power off 08:10,
Power on 16:34, X-track at Az = 243.66 deg, Sun-avoidance commanding 18:06,
Normal X-track 21:50, Power off 21:52.
10 69 In Survival Mode 25.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
11 70 In Survival Mode 28.00 -- -- --
12 71 In Survival Mode 30.00 -- -- --
13 72 In Survival Mode 31.00 -- -- --
14 73 In Survival Mode 32.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
15 74 In Survival Mode 33.00 -- -- -- Maximum Beta Angle for cycle.
16 75 In Survival Mode 32.00 -- -- --
17 76 X -- -- 31.00 -- -- -- Power on 05:36, Normal X-track [Az = 180 deg] 08:06, Power off 13:42.
18 77 X -- -- 29.00 -- -- -- Power on 06:53, Normal X-track [Az = 180 deg] 08:35, [ A to B ASYNCH AZIMUTH SCAN; Head stowed] 07:05, Power off 13:31. Orbit Adjustment (Delta V maneuvers)
19 78 X -- -- 27.00 -- -- -- Power on 07:22, Normal X-track [Az = 180 deg] 08:06, Power off 15:31.
20 79 X -- -- 24.00 -- -- -- Power on 07:52, Normal X-track [Az = 180 deg] 08:25, Power off 12:42.
21 80 X -- -- 21.00 -- -- -- Power on 05:01, Normal X-track [Az = 180 deg] 06:34, Power off 11:44.
22 81 X -- -- 17.00 -- -- -- Power on 05:20, Normal X-track [Az = 180 deg] 07:35, Power off 11:56.
Orbit Adjustment (Delta V maneuvers)
23 82 X -- -- 14.00 -- -- -- Power on 03:08, Normal X-track [Az = 180 deg] 04:07, Power off 10:41.
24 83 X -- -- 10.00 -- -- -- Power on 05:09, Normal X-track [Az = 180 deg] 05:24, Power off 11:13.
25 84 X -- -- 6.00 -- -- -- Power on 03:56, Normal X-track [Az = 180 deg] 05:27, Power off 10:03.
26 85 X -- -- 2.00 -- -- -- Power on 05:22, Normal X-track [Az = 180 deg] 05:37, Power off 10:33.
Spacecraft Yaw maneuver - 14:51:27 UT, +X to -X forward. Beta changed (+ to - values)
27 86 In Survival Mode -3.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
28 87 In Survival Mode -7.00 -- -- --
29 88 X -- -- -10.00 -- -- -- Power on 23:08, Normal X-track [Az = 180 deg] 23:40.
30 89 X -- -- -14.00 -- -- -- Power off 04:32, Power on 15:10, Normal X-track [Az = 180 deg] 16:20, Power off 20:39.
31 90 X -- -- -18.00 -- -- -- Power on 05:58, Normal X-track [Az = 180 deg] 07:40, Power off 12:29, Power on 23:02.
 
July 1999
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 152 In Survival Mode 7.00 -- -- --
2 153 In Survival Mode 11.00 -- -- --
3 154 In Survival Mode 16.00 -- -- --
4 155 In Survival Mode 20.00 -- -- --
5 156 In Survival Mode 24.00 -- -- --
6 157 In Survival Mode 29.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
7 158 In Survival Mode 34.00 -- -- --
8 159 In Survival Mode 38.00 -- -- --
9 160 In Survival Mode 42.00 -- -- --
10 161 In Survival Mode 46.00 -- -- --
11 162 In Survival Mode 50.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
12 163 In Survival Mode 53.00 -- -- --
13 164 In Survival Mode 56.00 -- -- --
14 165 In Survival Mode 58.00 -- -- --
15 166 In Survival Mode 58.00 -- -- -- Maximum Beta Angle for cycle.
16 167 In Survival Mode 58.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
17 168 In Survival Mode 56.00 -- -- --
18 169 In Survival Mode 54.00 -- -- --
19 170 X -- -- 51.00 -- -- -- Power on 02:07 UT, Instrument powered on for Australia field campaign. X-track 02:14 UT; Power off 04:45 UT
20 171 In Survival Mode 48.00 -- -- --
21 172 X -- -- 44.00 -- -- -- Power on 02:05 UT, Instrument powered on for Australia field campaign. Xtrack 02:11 UT, Power off 03:55 UT. Orbit Adjustment (Delta V maneuvers)
22 173 In Survival Mode 40.00 -- -- --
23 174 X -- -- 35.00 -- -- -- Power on 01:16 UT, Instrument powered on for Australia field campaign. X-track 01:22 UT,
Power off 03:07 UT.
24 175 In Survival Mode 31.00 -- -- --
25 176 X -- -- 26.00 -- -- -- Power on 00:30 UT, Instrument powered on for Australia field campaign. X-track 00:37 UT, Power off 02:21 UT. Power on 23:15 UT, X-track 23:21 UT
26 177 X -- -- 22.00 -- -- -- Power off 01:37 UT, Power on 22:43 UT, Instrument powered on for Australia field campaign. X-track 22:48 UT. Orbit Adjustment (Delta V maneuvers)
27 178 X -- -- 17.00 -- -- -- Power off 01:34 UT, Power on 22:33 UT, Instrument powered on for Australia field campaign.
X-track 22:38 UT
28 179 X -- -- 13.00 -- -- -- Power on 23:04 UT, Instrument powered on for Australia field campaign.
X-track 23:08 UT.
29 180 X -- -- 9.00 -- -- -- Power off 00:41 UT, Power on 21:56 UT, Instrument powered on for Australia field campaign.
X-track 22:01 UT, Power off 23:30 UT.
30 181 X -- -- 5.00 22:15 -- -- Power on 19:25 UT, Instrument powered on for Australia field campaign.
X-track 19:31 UT. Level 2 SWICS Test performed every 10 minutes starting 19:50 UT. Orbit Adjustment (Delta V maneuvers)
June 1999  
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 182 X -- -- 1.00 -- -- -- Power off 02:08 UT, Power on 20:50 UT. Instrument powered on for Australia field campaign. Continued to perform Level 2 SWICS tests to 02:00 UT every 10 min. A-B Sync Test 21:20 UT - 21:32 UT. Power off 23:00 UT. Spacecraft yaw maneuver - 18:40 UT, +X to -X forward. Beta changed (+ to - values).
2 183 X -- -- -2.00 -- -- -- Power on 19:37 UT, Instrument powered on for Australia field campaign. X-track 19:43 UT; Power off 21:53 UT.
3 184 X -- -- -5.00 -- -- -- Power on 20:01 UT, Instrument powered on for Australia field campaign. X-track 20:05 UT, Power off 21:50 UT.
4 185 X -- -- -7.00 -- -- -- Power on 18:49 UT, Instrument powered on for Australia field campaign. X-track 18:53 UT, Power off 21:01 UT. Orbit Adjustment (Delta V maneuvers)
5 186 X -- -- -9.00 -- -- -- Power on 19:13 UT, Instrument powered on for Australia field campaign. X-track 19:17 UT,
Power off 21:00 UT.
6 187 In Survival Mode -11.00 -- -- --
7 188 In Survival Mode -12.00 -- -- --
8 189 In Survival Mode -12.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
Minimum Beta Angle for cycle.
9 190 In Survival Mode -12.00 -- -- --
10 191 In Survival Mode -12.00 -- -- --
11 192 In Survival Mode -10.00 -- -- --
12 193 In Survival Mode -9.00 -- -- --
13 194 X -- -- -6.00 -- -- -- Power on 03:00 UT, Instrument powered on for Australia field campaign. X-track 03:05 UT, Power off 04:52 UT.
14 195 X -- -- -4.00 -- -- -- Power on 02:22 UT, Instrument powered on for Australia field campaign. X-track 02:27 UT, Power off 05:42 UT. Orbit Adjustment (Delta V maneuvers)
UTCF value adjusted.
New UTCF value = 31535996.862426 seconds.
15 196 X -- -- -1.00 -- -- -- Power on 02:43 UT, Instrument powered on for Australia field campaign. X-track 02:48 UT, Power off 04:29 UT. Spacecraft Yaw maneuver - 10:18:07 UT, -X to +X forward. Beta changed (- to + values).
16 197 X -- -- 3.00 -- -- -- Nauru experiment. Power on at 01:34 UT; Operations include ABASYNC-Stow; X-track-Noise#1, Solar Cal, & Int Cal. Power off at 06:05 UT; Power on: 22:54 UT; Cross-track: 23:01 - 23:59:59 UT.
17 198 X -- -- 6.00 -- -- -- Nauru experiment. Cross-track-normal scan at 00:00 UT, Power off at 06:27 UT.
18 199 In Survival Mode 10.00 -- -- --
19 200 In Survival Mode 14.00 -- -- --
20 201 In Survival Mode 19.00 -- -- --
21 202 In Survival Mode 23.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
22 203 In Survival Mode 27.00 -- -- --
23 204 In Survival Mode 31.00 -- -- --
24 205 In Survival Mode 36.00 -- -- --
25 206 In Survival Mode 40.00 -- -- --
26 207 In Survival Mode 43.00 -- -- --
27 208 In Survival Mode 47.00 -- -- --
28 209 In Survival Mode 49.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
29 210 In Survival Mode 52.00 -- -- -- UTCF value adjusted.
New UTCF value = 31535996.861549 seconds.
30 211 In Survival Mode 53.00 -- -- --
31 212 In Survival Mode 53.00 -- -- -- Maximum Beta Angle for cycle
 
February 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 1 X -- -- -56.00 13:25:00 -- -- Orbit Adjustments (Delta V maneuvers)
2 2 -- X -- -53.00 13:52:57 -- -- Minimum beta angle for this cycle
3 3 X -- -- -50.00 14:20:00 -- --
4 4 X -- -- -46.00 14:31:39 12:45:00 --
5 5 -- X -- -42.00 19:39:36 17:44:00 --
6 6 X -- -- -38.00 15:29:55 13:33:52 --
7 7 X -- -- -33.00 09:45:05
22:00:00		 07:51:07 -- 3 orbits deep-space calibration
8 8 X -- -- -28.00 10:09:57
22:02:00		 08:13:00 -- 3 orbits deep-space calibration
9 9 X -- -- -24.00 13:35:00 11:39:43 --
10 10 X -- -- -19.00 15:30:00 12:01:57 --
11 11 -- -- X -15.00 14:19:54 12:24:31 --
12 12 X -- -- -10.00 -- -- --
13 13 X -- -- -6.00 13:43:41 13:09:00 --
14 14 -- -- X -2.00 13:55:00 -- -- Spacecraft yaw maneuver - 20:48:00, - X axis to + X axis forward
15 15 X -- -- 2.00 13:49:55 -- 13:15:20 Instrument was in MAM scan profile during internal calibration. APID was diagnostic.
16 16 X -- -- 5.00 13:10:00 -- --
17 17 -- -- X 8.00 12:00:56 -- --
18 18 X -- -- 10.00 12:35:48 -- 12:01:10 Instrument was in MAM scan profile during internal calibration. APID was diagnostic.
19 19 X -- -- 12.00 14:13:56 -- --
20 20 -- -- X 14.00 -- -- --
21 21 X -- -- 15.00 -- -- --
22 22 X -- -- 15.00 -- -- -- Maximum beta angle for cycle
23 23 -- -- X 15.00 -- -- --
24 24 X -- -- 14.00 -- -- --
25 25 X -- -- 13.00 -- -- --
26 26 -- -- X 12.00 -- -- --
27 27 X -- -- 9.00 -- -- --
28 28 X -- -- 6.00 14:41:00 12:47:30 --
29 29 -- -- X 3.00 -- -- -- Spacecraft yaw maneuver - 23:30:11, + X axis to - X axis
forward
30 30 X -- -- -1.00 -- -- -- Beta changed from + values to - values
31 31 X -- -- -5.00 -- -- --
January 1998  
March 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 32 -- -- X -8.00 -- -- --
2 33 X -- -- -13.00 -- -- --
3 34 X -- -- -17.00 -- -- --
4 35 -- -- X -21.00 -- -- -- Orbit adjustment (Delta V maneuvers)
5 36 X -- -- -25.00 -- -- --
6 37 X -- -- -29.00 -- -- --
7 38 -- X -- -33.00 -- -- --
8 39 X -- -- -37.00 -- -- --
9 40 X -- -- -40.00 -- -- --
10 41 -- X -- -43.00 -- -- --
11 42 X -- -- -46.00 14:00:00 12:02:10 --
12 43 X -- -- -47.00 -- -- --
13 44 -- X -- -48.00 -- -- -- Minimum Beta Angle for cycle
14 45 X -- -- -48.00 -- -- --
15 46 X -- -- -47.00 -- -- --
16 47 -- X -- -45.00 -- -- -- Orbit adjustment (Delta V manuevers)
17 48 X -- -- -43.00 -- -- --
18 49 X -- -- -40.00 -- -- --
19 50 -- X -- -36.00 -- -- --
20 51 X -- -- -32.00 -- -- --
21 52 X -- -- -28.00 -- -- --
22 53 -- X -- -23.00 -- -- --
23 54 X -- -- -19.00 -- -- --
24 55 X -- -- -14.00 -- -- --
25 56 -- -- X -9.00 13:17:59 -- 12:14:51 Orbit adjustment (Delta-V maneuvers)
26 57 X -- -- -4.00 -- -- --
27 58 X -- -- 0.00 -- -- -- Spacecraft yaw maneuver- 12:00:00, -X axis to +X axis forward, Beta changed (- to + values)
28 59 -- -- X 5.00 -- -- --
February 1998  
April 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 60 X -- -- 9.00 -- -- --
2 61 X -- -- 13.00 -- -- --
3 62 -- -- X 17.00 -- -- -- Spacecraft low power problem.
Instrument powered off at 21:30:51
4 63 X -- -- 21.00 -- -- -- Instrument operation recovery at 01:43:45
5 64 X -- -- 24.00 -- -- --
6 65 -- X -- 26.00 -- -- --
7 66 X -- -- 28.00 -- -- --
8 67 X -- -- 30.00 -- -- --
9 68 -- X -- 31.00 -- -- --
10 69 X -- -- 31.00 -- -- -- Maximum beta angle for cycle
11 70 X -- -- 30.00 14:00:00 -- 13:03:50
12 71 -- X -- 29.00 -- -- --
13 72 X -- -- 27.00 -- -- --
14 73 X -- -- 25.00 -- -- --
15 74 -- X -- 22.00 -- -- -- Orbit adjustment (Delta V maneuvers)
16 75 X -- -- 18.00 -- -- --
17 76 X -- -- 15.00 -- -- --
18 77 -- -- X 11.00 -- -- --
19 78 X -- -- 7.00 -- -- --
20 79 X -- -- 3.00 -- -- --
21 80 -- -- X -1.00 -- -- -- Spacecraft yaw maneuver- 00:27:00, + X axis to - X axis forward. Beta changed (+ to - values)
22 81 X -- -- -5.00 -- -- --
23 82 X -- -- -9.00 -- -- --
24 83 -- -- X -13.00 -- -- --
25 84 X -- -- -17.00 14:53:00 12:58:30 --
26 85 X -- -- -20.00 -- -- --
27 86 -- X -- -23.00 -- -- --
28 87 X -- -- -26.00 -- -- -- Orbit adjustment (Delta V maneuvers)
29 88 X -- -- -28.00 -- -- --
30 89 -- X -- -29.00 -- -- --
31 90 X -- -- -30.00 -- -- --
March 1998  
May 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 91 X -- -- -30.00 -- -- -- Minimum Beta Angle for cycle
2 92 -- X -- -30.00 -- -- --
3 93 X -- -- -29.00 -- -- --
4 94 X -- -- -27.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
5 95 -- X -- -25.00 -- -- --
6 96 X -- -- -22.00 -- -- --
7 97 X -- -- -19.00 -- -- --
8 98 -- -- X -15.00 14:11:00 -- 13:08:40
9 99 X -- -- -11.00 -- -- --
10 100 X -- -- -7.00 -- -- -- Orbit adjustment (Delta V maneuvers)
11 101 -- -- X -2.00 -- -- -- Spacecraft yaw maneuver - 19:11:05, -X axis to +X axis forward, Beta changed (- to + values)
12 102 X -- -- 2.00 -- -- --
13 103 X -- -- 7.00 -- -- --
14 104 -- -- X 12.00 -- -- --
15 105 X -- -- 16.00 -- -- --
16 106 X -- -- 21.00 -- -- -- Orbit adjustment (Delta V maneuvers)
17 107 -- X -- 26.00 -- -- --
18 108 X -- -- 30.00 -- -- --
19 109 X -- -- 34.00 -- -- --
20 110 -- X -- 38.00 -- -- --
21 111 X -- -- 41.00 -- -- --
22 112 X -- -- 44.00 14:59:00 -- 13:55:20
23 113 -- *Alongtrack -- 46.00 -- -- -- Orbit adjustment (Delta V maneuvers), Instrument commanded to safe due to solar warning at beginning of day due to command error.
24 114 X -- -- 48.00 -- -- --
25 115 X -- -- 48.00 -- -- -- Maximum beta angle for cycle. Instrument safed due to spacecraft Sun Acquisition mode.
26 116 -- X -- 48.00 -- -- -- Non nominal azimuth-rotation rate = 7.2 deg/sec
27 117 X -- -- 47.00 18:23:00 16:33:00 -- Special calibrations performed
28 118 X -- -- 45.00 -- -- --
29 119 -- X -- 42.00 -- -- -- Azimuth rotation rate correct = 6.0 deg/sec
30 120 X -- -- 39.00 -- -- --
April 1998  
June 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 121 X -- -- 35.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
2 122 -- X -- 32.00 -- -- --
3 123 X -- -- 28.00 -- -- --
4 124 X -- -- 23.00 -- -- --
5 125 -- -- X 19.00 -- -- --
6 126 X -- -- 15.00 14:19:00 -- 13:16:20
7 127 X -- -- 11.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
8 128 -- -- *Alongtrack 7.00 -- -- -- Sun-avoidance commands required.
9 129 X -- -- 3.00 -- -- --
10 130 X -- -- 1.00 -- -- -- Spacecraft yaw maneuver - 01:24:29, +X axis to -X axis forward, Beta changed ( + to - values)
11 131 -- -- X -4.00 -- -- --
12 132 X -- -- -7.00 -- -- --
13 133 X -- -- -10.00 -- -- --
14 134 -- -- X -12.00 -- -- --
15 135 X -- -- -14.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
16 136 X -- -- -15.00 -- -- --
17 137 -- -- X -15.00 -- -- --
18 138 X -- -- -15.00 -- -- -- Minimum Beta Angle for cycle
19 139 X -- -- -15.00 -- -- --
20 140 -- -- X -14.00 15:05:00 13:11:20 --
21 141 X -- -- -12.00 -- -- --
22 142 X -- -- -10.00 -- -- --
23 143 -- -- *Alongtrack -7.00 -- -- -- Orbit Adjustment (Delta V maneuvers),
Sun-avoidance commands required.
24 144 X -- -- -4.00 -- -- --
25 145 X -- -- 0.00 -- -- -- Spacecraft yaw maneuver - 10:11:06, -X axis to +X axis forward, Beta changed ( - to + values)
26 146 -- -- X 3.00 -- -- -- Gimbal error data acquired from 21:00:00 - end of day
27 147 X -- -- 7.00 -- -- --
28 148 X -- -- 11.00 -- -- --
29 149 -- -- X 16.00 -- -- --
30 150 X -- -- 20.00 -- -- --
31 151 X -- -- 25.00 -- -- --
May 1998  
July 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 152 -- X -- 29.00 -- -- --
2 153 X -- -- 34.00 -- -- --
3 154 X -- -- 38.00 14:14:30 -- 13:15:10 Orbit Adjustment (Delta V maneuvers)
4 155 -- X -- 43.00 -- -- --
5 156 X -- -- 47.00 -- -- --
6 157 X -- -- 50.00 -- -- --
7 158 -- *Alongtrack -- 53.00 -- -- --
8 159 X -- -- 56.00 -- -- --
9 160 X -- -- 57.00 -- -- -- On-board data recorder overflow: 15:35:00 - 15:38:40
10 161 -- X -- 58.00 -- -- -- Maximum Beta Angle for cycle
11 162 X -- -- 58.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
12 163 X -- -- 56.00 -- -- --
13 164 -- X -- 54.00 -- -- --
14 165 X -- -- 51.00 -- -- --
15 166 X -- -- 47.00 -- -- --
16 167 -- X -- 43.00 -- -- --
17 168 X -- -- 39.00 13:44:00 11:50:20 --
18 169 X -- -- 34.00 -- -- --
19 170 -- X -- 30.00 -- -- --
20 171 X -- -- 25.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
21 172 X -- -- 21.00 -- -- -- Instrument commanded to safe mode for 3.5 hours at beginning of day - due to S/C command upload problem
22 173 -- -- *Alongtrack 17.00 -- -- -- Sun-avoidance commands required.
23 174 X -- -- 12.00 -- -- --
24 175 X -- -- 8.00 -- -- --
25 176 -- -- X 5.00 -- -- -- Value of UTCF adjusted by -870 microseconds. New value of UTCF = 31535997.882141 seconds
26 177 X -- -- 1.00 -- -- -- Spacecraft yaw maneuver - 11:52:27, +X axis to -X axis forward, Beta changed ( + to - values)
27 178 X -- -- -2.00 -- -- --
28 179 -- -- X -5.00 -- -- --
29 180 X -- -- -7.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
30 181 X -- -- -9.00 -- -- --
June 1998  
August 1998
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 182 -- -- X -11.00 12:59:00 -- 11:54:59
2 183 X -- -- -12.00 -- -- --
3 184 X -- -- -12.00 -- -- -- Minimum Beta Angle for the cycle
4 185 -- -- X -12.00 -- -- --
5 186 X -- -- -11.00 -- -- --
6 187 X -- -- -10.00 -- -- --
7 188 -- -- *Alongtrack -8.00 -- -- -- Sun-avoidance commands required. Orbit Adjustment (Delta V maneuvers)
8 189 X -- -- -5.00 -- -- --
9 190 X -- -- -3.00 -- -- --
10 191 -- -- X 0.00 -- -- -- Spacecraft yaw maneuver - 01:58:16, -X axis to +X axis forward, Beta changed ( - to + values)
11 192 X -- -- 4.00 -- -- --
12 193 X -- -- 8.00 -- -- --
13 194 -- -- X 12.00 -- -- --
14 195 X -- -- 16.00 -- -- --
15 196 X -- -- 20.00 13:39:00 11:48:10 --
16 197 -- X -- 24.00 06:26:00, 08:50:00, 12:40:00, 14:55:00 -- -- Special calibrations during eclipse (orbit shadow) included use of abbreviated int. sequence for the first time; Orbit Adjustment (Delta V maneuvers)
17 198 X -- -- 29.00 03:50:00, 06:08:00, 08:30:00, 10:45:00, 12:55:00, 15:20:00 -- -- Special calibrations during eclipse (orbit shadow) included use of abbreviated int. sequence.
18 199 X -- -- 33.00 -- -- --
19 200 -- X -- 37.00 -- -- --
20 201 X -- -- 41.00 -- -- --
21 202 X -- -- 45.00 -- -- --
22 203 -- *Alongtrack -- 48.00 -- -- -- Sun-avoidance commands not required
23 204 X -- -- 51.00 -- -- --
24 205 X -- -- 53.00 -- -- --
25 206 -- X -- 54.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
26 207 X -- -- 54.00 -- -- -- Maximum Beta Angle for the cycle
27 208 X -- -- 54.00 -- -- --
28 209 -- X -- 52.00 -- -- --
29 210 X -- -- 50.00 13:01:00 -- --
30 211 X -- -- 46.00 -- -- 12:29:40 Delayed because of azimuth rotation constraints.
31 212 -- X -- 43.00 -- -- --
July 1998  
Day of Month Day of Year Scan Mode Beta Angle, deg Calibrations, UT Special Operations/Comments
Fixed Azimuth Plane (FAP) Rotating Azimuth Plane (RAP) Internal Solar
Cross Track Along Track Unrestricted Biaxial Restricted Biaxial Sunrise Sunset
1 213 X -- -- 39.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
2 214 X -- -- 35.00 -- -- --
3 215 -- X -- 30.00 -- -- -- Verified spacecraft position predictions near DOE ARM site in Oklahoma.
4 216 X -- -- 25.00 -- -- --
5 217 X -- -- 21.00 -- -- --
6 218 -- -- *Alongtrack 16.00 -- -- -- Sun-avoidance commands required. UTCF value adjusted. New UTCF = 31535997.881288 seconds
7 219 X -- -- 12.00 -- -- --
8 220 X -- -- 7.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
9 221 -- -- X 3.00 -- -- -- Spacecraft yaw maneuver - 21:10:54, +X axis to -X axis forward. X-track operation from 21:56 to 22:56 UT near DOE ARM site in Oklahoma.
10 222 X -- -- -2.00 -- -- -- Beta changed (+ to - values)
11 223 X -- -- -6.00 -- -- --
12 224 -- -- X -9.00 15:25:00 13:30:50 -- X-track operation from 21:30 to 22:30 UT near DOE ARM site in Oklahoma. UTCF value adjusted. New UTCF = 31535997.880443 seconds
13 225 X -- -- -12.00 -- -- --
14 226 X -- -- -15.00 -- -- --
15 227 -- -- X -18.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
X-track operation from 19:40 to 20:30 UT near DOE ARM site in Oklahoma
16 228 X -- -- -20.00 -- -- --
17 229 X -- -- -21.00 -- -- --
18 230 -- X -- -22.00 -- -- -- X-track operation from 17:45 to 19:45 UT near DOE ARM site in Oklahoma.
19 231 X -- -- -22.00 -- -- -- Minimum Beta Angle for the cycle
20 232 X -- -- -22.00 -- -- --
21 233 -- -- *Alongtrack -21.00 -- -- -- Sun-avoidance commands required. Orbit Adjustment (Delta V maneuvers)
X-track operation from 15:50 to 17:41 UT near DOE ARM site in Oklahoma.
22 234 X -- -- -19.00 -- -- --
23 235 X -- -- -17.00 -- -- -- UTCF value adjusted. New UTCF = 31535997.879569 seconds
24 236 -- -- X -14.00 -- -- -- X-track operation from 13:35 to 15:55 UT near DOE ARM site in Oklahoma. Last day in biaxial scan mode following onset of DAA + 15-volt anomaly.
25 237 X -- -- -11.00 -- -- -- Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 12:00 - 15:00 UT.
26 238 X -- -- -8.00 -- -- -- Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 12:00 - 14:00 UT.
27 239 X -- -- -4.00 -- -- -- Orbit Adjustment (Delta V maneuvers)
In cross-track scan mode because of DAA + 15-volt anomaly. Values exceeded 16.0 volts during orbits between 11:00 - 14:00 UT.
28 240 X -- -- 0.00 -- -- -- Spacecraft yaw maneuver - 7:07:09, -X axis to +X axis forward. New elevation scan profile uploaded and tested. Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 11:00 - 19:00 UT.
29 241 X -- -- 4.00 -- -- -- Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 09:00 - 21:00 UT.
30 242 X -- -- 8.00 -- -- -- In cross-track mode because of DAA + 15-volt anomaly. Values exceeded 16.0 volts during orbits between 10:00 and 20:00 UT. Azimuth gimbal rotated to 5.0 deg at 19:08:57 UT.
31 243 -- -- -- 12.00 -- -- -- Azimuth = 5.0 degs, Normal Earth scan till 11:24:46 when instrument commanded to safe. Commanded to Normal Earth scan at 21:42:38. SWICS set to level 3 at 21:45:49.