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Satellite Image Processing  


    ALOS stands for Advanced Land Observing Satellite, which was launched by Japan Aerospace Exploration Agency in January 2006. Its Japanese name is "DAICHI".

The size of DAICHI is 3.5m wide x 4.5m long x 6.5m high, with its Solar Battery Paddle is 22m x 3m wide, gross weight is approximately 4 tons, which is one of the largest among Land Observing Satellites.

ALOS major specifications

  Launch Date January 24, 2006
  Launching Vehicle H - IIA
  Launch Site Tanegashima Space Center, Japan
  Spacecraft Mass Approx. 4 tons
  Generated Power (Solar paddle) Approx. 7kw (at End Of Life)
  Designed EOL 3-5 years
  Orbit Sun Synchronous, Sub recurrent
  Repeat Cycle: 46 days
  Sub-Cycle : 2 days
  Altitude : 691.65km (Above the equator)
  Inclination : 98.16 deg.
  Attitude Determination Accuracy 2.0 x 10-4 deg. (off-line, with GCP)

  Position Determination Accuracy 1m (off-line)
  Data Rate 240Mbps (Via Data Relay Test Satellite)
  120Mbps (Direct Transmission)
  On-board Data Recorder Solid-state Data Recorder (90Gbytes)

ALOS has three earth-observing sensors: Panchromatic Remote Sensing Instrument for Stereo Mapping (PRISM) for detecting elevations with high observing land coverage highly accurately, and Phased Array type L - band Synthetic Aperture Radar (PALSAR) for observing land areas day and night regardless of atmospheric weather conditions.


    Is a high resolution satellite using a state-of-the-art BGIS 2000 sensor (PDF), QuickBird collects image data to 0.61m pixel resolution degree of detail. the satellite is an excellent source of high resolution environmental data useful for analysis of changes in land usage, agricultural and forest climates. QuickBirds imaging capabilities can be applied to various industries such as Oil and Gas Exploration & Production (E&P), Engineering and Construction and environmental studies

QuickBird Satellite Sensor Characteristics

Launch Date
October 18, 2001

Launch Vehicle
Boeing Delta II

Launch Location
Vandenberg Air Force Base, California, USA

Orbit Altitude
450 Km

Orbit Inclination
97.2, sun-synchronous

7.1 Km/sec (25,560 Km/hour)

Equator Crossing Time
10:30 AM (descending node)

Orbit Time
93.5 minutes

Revisit Time
1-3.5 days, depending on latitude (30 off-nadir)

Swath Width
16.5 Km x 16.5 Km at nadir

Metric Accuracy
23 meter horizontal (CE90%)

11 bits

Pan: 61 cm (nadir) to 72 cm (25 off-nadir)

MS: 2.44 m (nadir) to 2.88 m (25 off-nadir)

Image Bands
Pan: 450-900 nm
Blue: 450-520 nm
Green: 520-600 nm
Red: 630-690 nm
Near IR: 760-900 nm

    Is a German satellite designed to carry out its task for five years, independent of weather conditions and illumination, and reliably provides radar images with a resolution of up to 1m.

Technical Features include

Active phased array X-band SAR
Single, dual and quad polarisation
Side-looking acquisition geometry
Sun-synchronous dawn-dusk repeat orbit
Repetition rate: 11 days; due to swath overlay, a 2.5 day revisit time can be achieved
Orbit altitude range from 512 km to 530 km

Three operational imaging modes:

- SpotLight: up to 1m resolution, 10 km (width) x 5 km (length)
- StripMap: up to 3m resolution, 30 km (width) x 50 km (length)
- ScanSAR: up to 18 m resolution, 100 km (width) x 150 km (length)
- StripMap and ScanSAR: acquisition length extendable to 1,650 km

In the future, the PPP-funded TanDEM-X, a twin satellite to TerraSAR-X, will enhance the mission.
The satellite constellation will enable the generation of high-quality Digital Elevation Models (DEMs) on a global scale.

TerraSAR-X Data of Metro Manila
Mayon Volcano

also known as Mount Mayon, is an active stratovolcano in the province of Albay, in the Bicol Region, on the island of Luzon, in the Philippines.
This image is taken using TerraSar-X satellite.

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