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| Satellite Image Processing |
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| TerraSAR-X |
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.
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This image is taken using TerraSar-X satellite.
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 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.
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| QuickBird |
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 analyses 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
Speed
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%)
Digitization
11 bits
Resolution
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
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| ALOS |
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)
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This image is taken using ALOS satellite.
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Laguna De Bay
is the largest lake in the Philippines and the third largest freshwater lake in Southeast Asia (in terms of surface area) after Tonle Sap in Cambodia and Lake Toba in Sumatra, Indonesia. It is on the island of Luzon between the provinces of Laguna to the south and Rizal to the north.
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GIS Application