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Instrument: PRISM : Panchromatic Remote-sensing Instrument for Stereo Mapping
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Associated Platforms

Spectral/Frequency Information
Wavelength Keyword: Visible
Spectral/Frequency Coverage/Range: 0.52 μm - 0.77 μm

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The Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM)
is a panchromatic radiometer with 2.5-meter spatial resolution. Its
data will be used for extracting highly accurate digital elevation
model (DEM).

The PRISM has three independent optical systems for nadir, forward and
backward looking to achieve along-track stereoscopy. Each telescope
consists of three mirrors and several CCD detectors for pushbroom
scanning. The nadir-looking telescope provides 70 km width coverage;
forward and backward telescopes provide 35 km width coverage each.

The telescopes are installed on both side of its optical bench with
precise temperature control. Forward and backward telescopes are
inclined + and - 24 degrees from nadir to realize a base-to-height
ratio of 1.0. PRISM's wide field of view (FOV) provides fully
overlapped three-stereo (triplet) images (35 km width) without
mechanical scanning or yaw steering of the satellite. Without this
wide FOV, forward, nadir, and backward looking images would not
overlap each other due to the Earth's rotation.

[Summary provided by JAXA.]

Online Resources

Instrument Logistics
Instrument Owner: JAPAN/JAXA