2000-075A
EO-1 is the first Earth observing mission in the New Millenium Program, managed by NASA-GSFC. This is a next generation Landsat flight demo and will fly in the same orbit as Landsat 7 for comparisons, about one minute behind. Formation flying will involve a hydrazine thruster.
A PPT plasma thruster, with an SI of order 1000s, will be used for experimental attitude control.
The spacecraft frame is built by Swales Aerospace/Colorado Springs with heritage based on the MIDEX bus (also used for MAP). Mass is 588 kg full 566 dry (22 kg hydrazine). 2 kg of hydrazine will be used to reach initial orbit. Shape hexagon + 1 panel. 1.25dia 0.73high. Span about 5.5m.
The ALI has multispectral (30m) and panchromatic (10m) bands from 4000A to 2.5 microns, with a 36 km swath with a 0.12m SiC telescope.
In 2005, EO-1 entered an extended mission. It was taken out of formation with Landsat-7 and the orbit was slowly lowered while science operations continued. Orbit lowering was intended to reduce orbital life but in Mar 2017 when it was retired still in relatively high orbit, it was expected to stay up for another 4 decades.
| EO-1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2000 Nov 21 | 1824:25 | Launch by Delta 7320-10 | V SLC2W |
| T+1:04 SRM 1-3 out | |||
| T+1:39 SRM 1-3 sep 31 km | -6350 x 35? | ||
| T+4:24 MECO | |||
| T+4:27 VECO | |||
| T+4:29 St 1 sep | |||
| T+4:37 SES-1 112 km 4.84 km/s | -4900 x 150 ? | ||
| T+4:57 Fairing sep 126 km 4.90 km/s | -4830 x 165 ? | ||
| 1835:41 | T+11:16 SECO-1 | 185 x 713 x 98.2 | |
| 1920:00 | T+55:35 SES-2 | ||
| T+55:45 SECO-2 | 705 x 705 x 98.2 | ||
| 1924:25 | T+1:00:00 EO-1 sep | ||
| 1937:45 | T+1:13:20 DPAF sep | ||
| T+1:24:51 SES-3 | |||
| T+1:25:09 SECO-3 | 685 x 705 x 98.3 | ||
| 1955:10 | T+1:30:45 SAC-C sep | ||
| T+1:48:20 SES-4 depletion | |||
| T+1:48:31 SECO-4 | 697 x 1800 x 95.4 | ||
| 2014:25 | T+1:50:00 Munin sep | ||
| 2000 Dec 31 | 98.83 701 x 703 x 98.2 | ||
| 2005 Sep 27 | 98.83 701 x 703 x 98.2 | ||
| 2005 Sep 28 | Orbit lower | 98.72 696 x 698 x 98.2 | |
| 2005 Nov 15 | Orbit lower | 98.70 694 x 698 x 98.2 | |
| 2005 Dec 14 | Orbit lower | 98.67 693 x 697 x 98.2 | |
| 2006 Feb 14 | Orbit lower | 98.63 689 x 696 x 98.2 | |
| 2006 Mar 1 | Orbit lower | 98.61 687 x 696 x 98.2 | |
| 2006 Apr 5 | Orbit lower | 98.59 686 x 695 x 98.2 | |
| 2006 Aug 4 | 98.59 687 x 695 x 98.2 | ||
| 2017 Mar 17 | 98.34 671 x 686 x 98.2 | ||
| 2017 Mar 30 | end of ops | ||
Payload:
- ALI Advanced Land Imager, visible and SWIR (MIT-LL)
- Atmospheric Corrector, hsi to measure reflectance
- Hyperion Imaging spectrometer, 30-m res and 220 bands.
- Primex Teflon pulsed plasma thruster
No comments:
Post a Comment