WIND EXTENDED MISSION TRAJECTORY EVENT TIMELINE

EVENT DATE TIME DESCRIPTION
       
Phase 1:      
Halo orbit and DLS      
S15 10/25/97 10:20:18 36,260 km
      Go to halo orbit loop
S15 TCM Radial Delta-V 10/27/97 20:20:01 0.491 m/s
Reach halo orbit 12/2/97 11:38:56 200.5 Re
A26 2/23/98 18:05:22 238.6 Re
MCC-2 Radial Delta-V 3/10/98 21:15:00 0.70 m/s
Leave halo orbit loop 4/29/98 1:55:55 219.0 Re
MCC3 Radial Delta-V 5/5/98 13:55:09 1.29 m/s
S16-targ. Radial Delta-V 6/3/98 16:00:04 0.455 m/s
S16-targ. Axial Delta-V 6/3/98 16:25:46 54.1 m/s
S16 6/29/98 6:27:17 27,137 km
P26 7/2/98 19:10:14 11.0 Re, 71 min shadow
A27 7/13/98 21:55:30 92.2 Re
P27- Radial Delta-V 7/22/98 8:00:07 0.41 m/s
P27 7/24/98 19:49:22 10.3 Re, 64 min shadow
A28 8/4/98 23:07:55 93.5 Re
P28 Radial Delta-V 8/15/98 16:00:01 0.106 m/s
P28 8/16/98 1:54:07 9.3 Re, 61 min shadow
S17 8/19/98 4:41:41 33,305 km
      Start 2-month outer loop
A29 9/21/98 8:44:43 185.4 Re
S18-targ. Radial Delta-V 9/21/98 15:30:10 3.067 m/s
S18-targ. Axial Delta-V 9/21/98 16:15:25 7.362 m/s
S18 Radial Correction DV 10/15/98 5:45:25 1.361 m/s
S18 10/23/98 7:32:32 22,183 km
P29 10/26/98 10:10:09 3.7 Re, 35.3 min shadow
A30 11/4/98 14:07:51 87.3 Re
P30- Radial Delta-V 11/9/98 23:13:35 0.311 m/s
P30 11/13/98 17:34:57 3.5 Re, 34.3 min shadow
S19 11/17/98 4:41:33 15,054 km
Phase 2:      
High-inclination petal orbit      
A31 11/20/98 3:00:37 73.5 Re
P31 11/28/98 1:33:26 10.3 Re, Ecliptic inclination = 55 deg
A32 12/6/98 9:13:22 75.2 Re
P32 Radial Delta-V 12/14/98 17:00:21 6.58 m/s
P32 12/14/98 17:49:20 11.4 Re
P32 Axial Delta-V 12/14/98 18:15:03 15.83 m/s; Enter approximately 10 x 80 Re
      petal orbit with 17.5-day period and ecliptic
      inclination of 45 - 50 deg
A33 12/23/98 21:57:13 80.8 Re
P33 1/2/99 4:38:48 11.4 Re
A34 1/10/99 12:07:06 76.9 Re
P34 1/18/99 13:03:32 9.5 Re
A35 1/27/99 5:00:31 79.2 Re
Attitude correction maneuver 2/4/99 20:00:00 Correct to SEP-pointing attitude
P35 2/4/99 20:36:22 9.8 Re
A36 2/13/99 17:46:14 80.8 Re
P36 2/22/99 14:23:45 9.3 Re
A37 3/3/99 9:13:57 80.6 Re
A37+ Axial Delta-V* 3/5/99 13:17:19 0.882 m/s
P37 Radial Delta-V 3/11/99 19:30:04 1.991 m/s
P37 Axial Delta-V 3/11/99 20:15:30 2.103 m/s
P37 3/11/99 21:13:15 7.4 Re
A38 3/20/99 15:33:47 81.5 Re
A38+ Axial Delta-V 3/22/99 19:30:06 0.496 m/s
P38 Radial Delta-V 3/29/99 4:30:07 0.341 m/s
P38 3/29/99 6:45:00 6.3 Re
S20-Targ. Axial Delta-V 3/31/99 4:00:05 0.301 m/s
S20 4/1/99 20:34:44 2,354 km, 5.19 min shadow;
      Enter backflip
S20 TCM Radial Delta-V 4/3/99 22:00:09 1.202 m/s
S20 TCM Axial Delta-V 4/3/99 22:45:15 1.068 m/s
S21-Targ. Axial Delta-V 4/11/99 12:00:04 0.182 m/s
S21 4/15/99 13:08:26 20,927 km; End backflip, start phasing loop
Phase 3:      
Dayside DLS      
P39 4/22/99 18:25:41 19.8 Re
P39 Radial Delta-V 4/22/99 21:30:04 0.362 m/s
A40 Radial Delta-V 4/29/99 9:00:01 0.423 m/s
A40 4/29/99 22:08:37 57.5 Re
P40 5/7/99 1:00:37 19.7 Re
S22-Targ. Radial Delta-V 5/11/99 21:30:00 0.23 m/s
S22 5/12/99 21:05:36 3,554 km; Start 3-month outer loop of
      dayside DLS orbit
MCC-4 Radial Delta-V* 6/15/99 15:00:00 Possible correction maneuver
A41 6/26/99 0:39:17 211 Re
S23-Targ. Axial Delta-V* 7/27/99 15:00:00 13.2 m/s
S23 8/15/99 6:33:17 29,365 km; End 3-month outer loop,
      begin phasing orbit
P41 8/18/99 22:17:05 13.2 Re, 72 minute shadow
P41 Radial Delta-V* 8/18/99 22:17:05 Possible correction maneuver
A42 8/29/99 15:57:49 87.3 Re
A42+ Axial Delta-V* 9/1/99 11:00:00 Possible correction maneuver
P42 9/9/99 8:49:31 13.6 Re, 81 minute shadow
A43 9/19/99 23:07:26 86.9 Re
P43 Radial Delta-V* 9/30/99 13:00:00 Possible correction maneuver
P43 9/30/99 15:35:46 13.3 Re, 70 minute shadow
S24 10/4/99 13:48:22 25,777 km; Enter petal orbit with 16-day
      period and ecliptic inclination of 31 deg
Phase 4:      
Mid-inclination petal orbit      
P44 10/14/99 4:44:52 12.9 Re
P45 Radial/Axial Delta-V* 10/29/99 22:20:54 Possible correction maneuver
P45 10/29/99 22:20:54 14.2 Re
P46 11/14/99 13:45:01 14.5 Re
P47 11/30/99 14:27:20 15.0 Re
P47 Radial/Axial Delta-V* 11/30/99 14:27:20 Backflip targeting
A48+ Axial Delta-V* 12/10/99 15:00:00 Possible correction maneuver
P48 12/16/99 21:27:15 13.2 Re
S25 12/26/99 15:39:19 68,492 km; Reduce inclination to 21 deg
P49 12/31/99 9:35:17 10.6 Re
A50+ Axial Delta-V* 1/10/00 18:00:00 6.8 m/s; Backflip targeting
P50 Radial/Axial Delta-V* 1/16/00 15:00:00 Correction maneuver for backflip targeting
P50 1/16/00 17:37:10 10.0 Re
S26-Targ. Radial/Axial Delta-V* 1/19/00 17:00:00 Correction maneuver for backflip targeting
S26 1/20/00 2:41:43 6,736 km; Enter backflip
S26TCM Radial/Axial Delta-V* 1/22/00 20:00:00 Correction maneuver for backflip targeting
S27-Targ. Radial/Axial Delta-V* 1/29/00 15:00:00 Correction maneuver for backflip targeting
S27 2/2/00 4:32:03 3,697 km; End backflip, enter 2-month
      outer loop of dayside DLS
Phase 5:      
Dayside DLS      
S27TCM Radial/Axial Delta-V* 2/7/00 20:00:00 Post-backflip correction maneuver
A51 3/7/00 7:40:47 185 Re
S28-Targ. Axial Delta-V* 3/7/00 15:00:00 7.0 m/s
S28 4/7/00 5:03:00 46,959 km; End 2-month outer loop
       
* next to maneuver indicates tentative maneuver placement; date, time, and/or delta-V are subject to change      

Last Updated on 5/13/99
By FDF