Earth Observing-1: Difference between revisions
Added information about depleted fuel status as reported in EO-1 website. Note that there is a security certificate problem on that size which might be the reason this important fact was not noted on this page |
m →top: WP:CHECKWIKI error fix for #16. Remove invisible Unicode characters. Do general fixes if a problem exists. -, replaced: → |
||
| Line 55: | Line 55: | ||
EO-1 has also been used to test new software, like the Autonomous Sciencecraft Experiment. This allows the spacecraft to decide for itself how best to create a desired image. It is only limited by a priority list of different types of images, and by forecasts of cloud cover provided by the [[NOAA]]. |
EO-1 has also been used to test new software, like the Autonomous Sciencecraft Experiment. This allows the spacecraft to decide for itself how best to create a desired image. It is only limited by a priority list of different types of images, and by forecasts of cloud cover provided by the [[NOAA]]. |
||
It was expected to function for twelve months and was designed to function for eighteen months. Those expectations were greatly exceeded<ref>[http://earthobservatory.nasa.gov/Features/EO1Tenth/ Earth Observing-1: Ten Years of Innovation]</ref> however the hydrazine fuel was mostly depleted in February 2011. |
It was expected to function for twelve months and was designed to function for eighteen months. Those expectations were greatly exceeded<ref>[http://earthobservatory.nasa.gov/Features/EO1Tenth/ Earth Observing-1: Ten Years of Innovation]</ref> however the hydrazine fuel was mostly depleted in February 2011. Small maneuvers have been successful for debris avoidance but long duration burns for orbit maintenance are not being performed due to insufficient fuel.<ref>[https://eo1.gsfc.nasa.gov/EO-1%20Phase-F%20Report%2020160617%20Final.docx EO-1 Phase F Report]</ref> |
||
==See also== |
==See also== |
||
Revision as of 05:36, 12 January 2017
 | |
| Mission type | Earth observation |
|---|---|
| Operator | NASA / GSFC |
| COSPAR ID | 2000-075A |
| SATCAT no. | 26619 |
| Website | eo1.gsfc.nasa.gov |
| Mission duration | Planned: 1 year Elapsed: 23 years, 6 months, 6 days |
| Spacecraft properties | |
| Manufacturer | Swales Aerospace Northrop Grumman |
| Launch mass | 573 kilograms (1,263 lb) |
| Start of mission | |
| Launch date | 21 November 2000, 18:24:25 UTC |
| Rocket | Delta II 7320-10C |
| Launch site | Vandenberg SLC-2W |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Sun-synchronous |
| Semi-major axis | 7,058 kilometres (4,386 mi) |
| Eccentricity | 7.0691365E-4 |
| Perigee altitude | 690.0 kilometers (428.7 mi) |
| Apogee altitude | 700.0 kilometers (435.0 mi) |
| Inclination | 97.503 degrees |
| Period | 98.7 minutes |
| Instruments | |
| Advanced Land Imager (ALI) Hyperspectral Imager (Hyperion) Atmospheric Corrector | |
The Earth Observing-1 Mission (EO-1) satellite is part of NASA's New Millennium Program (NMP), to develop and validate a number of instrument and spacecraft bus breakthrough technologies designed to enable the development of future earth imaging observatories that will have a significant increase in performance while also having reduced cost and mass.
Its Advanced Land Imager (ALI) measures nine different wavelengths simultaneously, instead of the seven measured by the imager in Landsat 7. This permits a greater flexibility in false-color imagery. Another improvement is that instead of having an imaging spectrometer that sweeps from side to side, the ALI has a linear array of spectrometers that each scan a strip of ground parallel to that of adjacent spectrometers. In order to compare the two imagers, EO-1 follows Landsat 7 in its orbit by exactly one minute. Other new technologies include:
- Hyperion imaging spectrometer recording more than 200 wavelengths;
- phased array communications antenna;
- optical fiber cables connect the data logger with the two IBM RAD6000s;
- teflon-fuelled pulsed plasma thruster;
- lightweight, flexible solar panel;
- carbon-coated radiators for thermal control;
- Linear Etalon Imaging Spectrometer Array equipped with a new atmospheric correction device.
EO-1 has also been used to test new software, like the Autonomous Sciencecraft Experiment. This allows the spacecraft to decide for itself how best to create a desired image. It is only limited by a priority list of different types of images, and by forecasts of cloud cover provided by the NOAA.
It was expected to function for twelve months and was designed to function for eighteen months. Those expectations were greatly exceeded[1] however the hydrazine fuel was mostly depleted in February 2011. Small maneuvers have been successful for debris avoidance but long duration burns for orbit maintenance are not being performed due to insufficient fuel.[2]
See also
References
- "EO1 Mission Overview". NASA Goddard Space Flight Center. 19 November 2002. Retrieved 2009-04-16.
- Justin Ray (22 November 2000). "Delta 2 Rocket Puts Three Satellites into Earth Orbit". Spaceflight Now. Retrieved 2009-04-16.
External links
Template:Space-based meteorological observation
Earth reconnaissance satellites (excluding Russia and the United States) | |||||||
|---|---|---|---|---|---|---|---|
China  |
| ||||||
France  |
| ||||||
Germany  |
| ||||||
India  |
| ||||||
Israel  |
| ||||||
Italy  |
| ||||||
Japan  |
| ||||||
South Korea  |
| ||||||
Spain  |
| ||||||
Turkey  |
| ||||||
United Kingdom  |
| ||||||
 | This article about one or more spacecraft of the United States is a stub. You can help Wikipedia by expanding it. |