Landsat 4
| Landsat 4 | |
|---|---|
 Figure of Landsat 4, 5 | |
| Position | NASA/NOAA |
| The main manufacturer | Fairchild industry |
| Satellite bus | Multimission Modular Spacecraft |
| Duty | Earth observing satellite |
| It is targeted for go-around | The earth |
| The launching date and time | July 16, 1982 |
| Display machine | Delta 3920 () |
| Launching place | Vandenberg Air Force Base Second compound launch complex W |
| COSPAR ID | 1982-072A |
| Mass | 1,941 kg |
| Orbital element | |
| Orbit | Earth circular orbit, sun synchronous orbit |
| Orbit angle of inclination | 98.2 degrees |
| Distant visible point altitude | 704km |
| Perigee altitude | 700km |
| Orbit period | 98.81 minutes |
Landsat 4 (English: Landsat 4) is an earth observing satellite of the United States of America. It was launched in a satellite of the fourth plane of the Landsat plan on July 16, 1982. The original aim was to offer the archive of the Pan-global satellite image.
The Landsat plan was run by NASA, but the United States Geological Survey collected the data of Landsat 4 and distributed it. Because the scientific use of Landsat 4 lost the ability that a satellite sent scientific data to, I finished design life on past December 14, 1993 for five years. Was maintained by NASA until telemetering and the chase for safe service of the satellites retired on June 15, 2001 and was continued [1]; [2].
Characteristic
Landsat 4 had the biggest transmission bandwidth of the 85M bit per second, and マルチスペクトラルスキャナー (MSS) was changed to the new model, and the radiometer (Thematic Mapper, TM) sensor for the image was equipped with. The resolving power was up to 30m.
Landsat 4 lost ability to send ability from half of the solar cell for feeding and scientific data to the direct ground from launching during a short term and might be over for failure earlier than expectation. Therefore, I will launch Landsat 5 with the same specifications with Landsat 4 early. However, the scientific use of Landsat 4 would be reopened by TDRS system using data broadcast satellite having started operation and was in a condition of the standby in January, 1986 [1]. After Landsat 5 stopped a link with TDRS, Landsat 4 was returned to the operational state in 1987 to offer the international cover of satellite data. The image domain ability more than the eyes to an earth station was brought by having obtained a link with TDRS and continued use until I lost a link with TDRS in 1993 and finished the transmission of science data afterwards [2].
Landsat 4 was the first satellite which incorporated a TM sensor by a Landsat plan. The TM sensor of the Landsat was able to collect the data of 7 bands unlike MSS which collected the data of 4 bands. In band 1-5 and band 7 of the TM, space resolving power was 30m whereas I added a lot of three bands to having than MSS, and resolution could collect high data, and resolving power of MSS was 79m - 82m as for the TM data more. In band 6 which was heat red outside band, the resolving power between most sky was 120m. In addition, Landsat 5 was a backup satellite of specifications same as 4, but use was continued for the next 25 years [3].
Outside link
Note
- ^ a b "Landsat 4 History". United States Geological Survey. August 18, 2013 reading.
- ^ a b "The Landsat Program – History – Landsat 4". National Aeronautics and Space Administration. August 18, 2013 reading.
- ^ Hansen, Kathryn (March 2, 2009). "Earth-Observing Landsat 5 Turns 25". NASA. August 18, 2013 reading.
This article is taken from the Japanese Wikipedia Landsat 4
This article is distributed by cc-by-sa or GFDL license in accordance with the provisions of Wikipedia.
In addition, Tranpedia is simply not responsible for any show is only by translating the writings of foreign licenses that are compatible with CC-BY-SA license information.
0 개의 댓글:
댓글 쓰기