PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping)
“PRISM” has three independent optical systems for viewing nadir, forward and backward producing a stereoscopic image along the satellite’s track.
PRISM observes earth surface with 2.5m spatial resolution. It is used for mapping, urban planning, monitoring designated area etc. PRISM can also support “3D image”.
PRISM extracted image of Mt. Fuji
Right image was generated by PRISM on 2006/02/14 10:30.
Altitude information is calculated using three images on the right, then pile PRISM
Image at Nadir to make an bird’s eye view.
The Image also shows Kofu-Basin where detailed roads and rivers appear, at the same time, Lake Motosu on the right, then Mt. Fuji covered with snow and Fuji Subaru Line goes to the summit are clearly seen.
PRISM Major Characteristics
|Number of Bands||1 (Panchromatic)|
|Wavelength||0.52 to 0.77 micrometers|
|Number of Optics||3 (Nadir; Forward; Backward)|
|Base-to-Height ratio||1.0 (between Forward and Backward view)|
|Spatial Resolution||2.5m (at Nadir)|
|Swath Width||70km (Nadir only) / 35km (Triplet mode)|
|Number of Detectors||28000 / band (Swath Width 70km)
14000 / band (Swath Width 35km)
|Pointing Angle||-1.5 to +1.5 degrees(Triplet Mode, Cross-track direction)|
|Bit Length||8 bits|
|Mode 1||Triplet observation mode using Forward, Nadir, and Backward views (Swath width is 35km)|
|Mode 2||Nadir (70km) + Backward (35km)|
|Mode 3||Nadir (70km)|
|Mode 4||Nadir (35km) + Forward (35km)|
|Mode 5||Nadir (35km) + Backward (35km)|
|Mode 6||Forward (35km) + Backward (35km)|
|Mode 7||Nadir (35km)|
|Mode 8||Forward (35km)|
|Mode 9||Backward (35km)|