IKONOS
From Wikipedia, the free encyclopedia
 IKONOS 2 |
|
| Organization | GeoEye |
|---|---|
| Mission Type | Earth observation |
| Contractor | Lockheed Martin Space Systems |
| Satellite of | Earth |
| Launch | September 24, 1999 on an Athena 2 |
| Launch site | Vandenberg Air Force Base |
| Mission duration | 7 years |
| Mass | 726 kg (launch) |
| Webpage | http://www.geoeye.com/products/imagery/ikonos/default.htm |
| Orbital elements | |
| Semimajor Axis | 7056.97 km |
| Eccentricity | 0.00013 |
| Inclination | 98.10 degrees |
| Orbital Period | 98.33 minutes |
| Right ascension of the ascending node | 68.015 degrees |
| Argument of perigee | 93.06 degrees |
| Instruments | |
| Visible cameras | 1-meter panchromatic and 4-meter multispectral |
IKONOS is a commercial earth observation satellite, and was the first to collect publicly available high-resolution imagery at 1- and 4-meter resolution. It offers multispectral (MS) and panchromatic (PAN) imagery. The IKONOS launch was called in the New York Times “one of the most significant developments in the history of the space age.” IKONOS imagery began being sold on January 1, 2000.
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[edit] History
IKONOS comes from the Greek word for "image". Ikonos-1 was planned for launch in 1999 but the launch failed. Ikonos-2 was planned for launch in 2000, but was renamed Ikonos and was launched on September 24, 1999 from Space Launch Complex 6 (SLC-6) at Vandenberg Air Force Base in California to replace Ikonos-1. The imaging sensors are panchromatic and multispectral. This satellite has a polar, circular, sun-synchronous 681-km orbit and both sensors have a swath width of 11 km. Its weight is 1600 pounds (720 kg). Space Imaging was acquired by ORBIMAGE to form GeoEye.
[edit] Specifications
[edit] Spacecraft
Ikonos-2 is a 3-axis stabilized spacecraft, using the LM900 satellite bus system (also referred to as Block-1). The attitude is measured by two star trackers and a sun sensor and controlled by four reaction wheels; location knowledge is provided by a GPS receiver. The design life is 7 years; S/C body size=1.83 m x 1.57 m (hexagonal configuration); S/C mass = 817 kg; power = 1.5 kW provided by 3 solar panels.
The LM900 spacecraft is a three-axis stabilized bus that is designed to carry scientific payloads in LEO orbits. It provides precision pointing on an ultra stable highly agile platform. Payloads for a variety of scientific and remote sensing applications may be accommodated including laser sensors, imagers, radar sensors, electro-optical and astronomical sensors, as well as planetary sensors. The LM900 spacecraft design was based on the CRSS imaging bus. Hardware heritage is from CRSS and IRIDIUM.
[edit] Communications
IKONOS conducts telemetry, tracking and control in the 8345.968-8346.032 MHz band (downlink) and 2025-2110 MHz band (uplink). Downlink data carrier operates in the 8025-8345 MHz band.
[edit] Spatial resolution
- 0.8 m panchromatic (1-m PAN)
- 4-meter multispectral (4-m MS)
- 1-meter pan-sharpened (1-m PS)
Spectral Resolution
| Band | 1-m PAN | 4-m MS & 1-m PS |
|---|---|---|
| 1 (Blue) | 0.45-0.90 µm | 0.445-0.516 µm |
| 2 (Green) | * | 0.506-0.595 µm |
| 3 (Red) | * | 0.632-0.698 µm |
| 4 (Near IR) | * | 0.757-0.853 µm |
[edit] Temporal resolution
The revisit rate for IKONOS is 3 to 5 days off-nadir and 144 days for true-nadir.
[edit] Swath
11 km x 11 km (Single Scene)
[edit] See also
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image processing software by b.e.i.t. k.j. somaiya
[edit] References
- Annual Selection of Spectacular Satellite Images to be Determined by Public Voting Thursday, 23 December 2004
- Sensor Specifications: Ikonos NASA
