2001-055A
The TOPEX-Poseidon Follow On mission, Jason (retrospectively Jason-1), is built by Aerospatiale and is the first use of the Proteus satellite bus. [113], [114] [115]. It is a joint CNES/NASA/JPL project. It uses a C/Ku band radar altimeter. A microwave radiometer corrects for signal delay by measuring H2O and wind-related variations in sea surface emission. Mass is 506 kg and launch will be by Delta 7920-10 along with TIMED.
Proteus is developed by CNES in collaboration with Aerospatiale. Shape is box + 2 panels. 1.9 x 1.9 x 3.3m with about 5.0m span. Carries 28 kg of hydrazine.
In Apr 2002, commanding was transferred from CST to JPL, although CNES continued to support engineering and navigation.
In 2012 the satellite was preemptively moved to its final orbit; it continued operating, completing a nominal 406 day gravity mission. The spacecraft was turned off on 2013 Jul 1.
| Jason | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2001 Dec 7 | 1507:35 | Launch by Delta 7920-10C | V SLC2W |
| T+1:26 SRM 1-6 sep | |||
| T+2:11 SRM 7-9 sep | |||
| T+4:23 MECO 161km 5.665 km/s | |||
| T+4:37 SES-1 | |||
| T+4:41 Fairing sep | |||
| 1517:40 | T+10:05 SECO-1 | 215 x 1343 x 66.18 | |
| T+51:25 SES-2 285m/s 24s | |||
| 1559:24 | T+51:49 SECO-2 | 1320 x 1330 x 66.04 | |
| 1602:55 | T+55:20 Jason sep | ||
| 1607:15 | T+59:40 DPAF sep | ||
| 1613:57 | T+1:06:22 SES-3 | ||
| 1614:39 | T+1:07:04 SECO-3 | 636 x 1330 x 71.32 | |
| 1706:11 | T+1:58:36 SES-4 | ||
| 1706:51 | T+1:59:16 SECO-4 | 627 x 640 x 74.09 | |
| 1712:35 | T+2:05:00 TIMED sep | ||
| T+2:08:20 Cold gas evasive maneuver | |||
| T+2:37:30 SES-5 | |||
| 1745 | T+2:37:47 SECO-5 depletion | 187 x 630 x 76.8 | |
| 2002 Jan 10 | TCM to operational orbit | 1337 x 1337 | |
| 2002 Mar 16 | Small debris hit, two objects ejected | ||
| 2002 Apr 26 | Ops from CNES to JPL | ||
| 2012 Mar 3 | out of service | ||
| Leave altimetry reference orbit | |||
| Lower orbit, partial service | |||
| 2012 May 4 | Resume ops | 1323 x 1323 | |
| 2013 Jul 1 | end of ops | ||
Payload:
- GPS receiver (NASA)
- LRA Laser Retroreflector Array
- DORIS Doris antenna for orbit location
- POSEIDON Poseidon 2 altimeter 1.2m dia, 13.6 and 5.3 GHz
- Microwave Radiometer (JPL), 18.7, 23.8 and 34.0 GHz
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