Concept information
Preferred term
MOMS-02
Definition
- Ten years after the last spaceborne flights of the precursor MOMS-01 in 1983/84, the new concept of a combined stereo and multi- spectral payload, the Modular Optoelectronic Multispectral Stereo Scanner (MOMS-02), was realized. It was successfully operated during Space Shuttle flight STS-55 from April 26 to May 6, 1993, with an average orbital altitude of 296 km and a geographic coverage of +/- 28.5 latitude. MOMS-02 opens new horizons for Earth observation from space using three-linear stereo cameras. Investigations of the environment, agriculture, forestry and urban development as well as digital mapping and landscape modelling with a high degree of automation will be strongly improved by using the specific capabilities of this sensor. The entire MOMS-02 system was manufactured by DASA (German Aero- space) under contract of Deutsche Agentur fuer Raumfahrt-Angelegen- heiten (DARA) GmbH. German Space Agency DARA GmbH. Dept. for Special Applications P.O.Box 300364 D-53183 Bonn Federal Republic of Germany Phone: +49-228-447-582 Fax: +49-228-447-700 Technical Parameters: --------------------- The design features of the sensor provide at least the following imagery characteristics: i) three-linear stereo, ii) along track stereo, iii) high resolution, iv) multispectral, v) combinations of stereo and multispectral. The following spectral ranges and modes are provided: Multispectral bands spectral range spatial resolution band1 440-505 nm 13.5 m band2 530-575 nm 13.5 m band3 645-680 nm 13.5 m band4 770-810 nm 13.5 m Panchromatic bands spectral range spatial resolution band5 520-760 nm 4.5 m band6 520-760 nm 13.5 m band7 520-760 nm 13.5 m Mode Channel Combination No. of Data Takes 1 stereo channel 6,7; HR 15 2 multispectral channels 1,2,3,4 12 3 multispectral channels 3,4; stereo 6,7 7 4 multispectral channels 1,3,4; stereo 6 - 5 multispectral channels 1,3,4; stereo 7 1 6 multispectral channels 2,3,4; HR 13 7 multispectral channels 1,3,4; HR - Mode 4 and 7 were not operated. MOMS02 is designed for spectral data acquisition in visible and near infrared range (four channels) and for along-track stereo recording using a panchromatic channel for one nadir and two off-nadir looking modules. All stereo devices have equivalent bandpasses and provide a ground pixel size of 4.5mx4.5m (nadir: band 5) and 13.5mx13.5m (tilted optics: bands 6 and 7). A ground pixel size of 13.5mx13.5m for the spectral channels is considered as a sound compromise between a high spectral resolution and a reasonable signal to noise ratio. For all operated modes, except the full stereo mode, the nadir orien- tation of the Space Shuttle was held within a limit of 1 degree. For the stereo mode the roll angle limits had to be extended to 3 degrees due to technical reasons. Imaging Geometry: ----------------- The swath width for the high resolution channel can be as much as 37 km, depending on the recording mode, and 78 km for the other channels. These values are relative to the nominal altitude of 296 km. Because of the viewing angle of 21.4 degrees of the two off-nadir stereo channels, the image swath on the Earth`s surface for these channels is separated from the swath of the nadir channels by about 120 km. The three stereo cameras allow the imaging of a strip almost simultaneously with three different viewing angles in a time distance of about 20 seconds. Possible platform movements have to be compen- sated. Data Processing and Ordering: ----------------------------- Additional information available at "http://www.nz.dlr.de/moms2p/techdat/" (en)
Broader concept
URI
https://gcmd.earthdata.nasa.gov/kms/concept/79241b91-40b5-4a81-96c5-f92ab39584bd
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