From Wikipedia, the free encyclopedia

IKONOS

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	spaceimaging.com/products/ikonos/
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. The company GeoEye distributes IKONOS imagery under the product name CARTERRA.

Contents 1 History 2 Specifications 2.1 Spacecraft 2.2 Communications 2.3 Spatial resolution 2.4 Temporal resolution 2.5 Swath

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.

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.

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.

• 1-meter 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

The revisit rate for IKONOS is 3 to 5 days off-nadir and 144 days for true-nadir.

11 km x 11 km (Single Scene)