TM 2 MOMS SOO TM 4 MOMS 900
Fig. 9: Testsite Atacama desert, Chile. The histo
grams show a comparable dynamic range due
to MOMS being switched to gain 2.
TM 6 bit MOMS 7 bit
Fig. 10: Operating in gain level 2, MOMS uses its
7 bit feature space nearly complete in
contrast to TM with its 8 bit feature
space.
nm, 630 + 20 nm, 900 + 75 nm) with 12 m ground
pixel size, 900 nm band with 100 km swath width,
560 und 630 nm bands half of it;
- two panchromatic bands with 12 m ground resolution
each at 50 km swath width, spectral range 600 -
800 nm; the stereo convergence angle on account of
technical frame conditions is limited to 20
degrees; taking into consideration the instrument's
spatial resolution, a height resolution of 40 m
can be achieved.
When comparing the M0MS-02 to MOMS-01, the following
important improvements have to be pointed out:
- three multispectral bands for a straight forward
false color image generation and the possibility
for an automatic classification;
- 12 m ground pixel size versus 20 m;
- stereoscopic in-track data acquisition.
With respect to the goal to develop and construct a
flexible advanced MOMS instrument featuring
combined stereoscopic and multispectral capabili
ties for an operational application in the mid
nineties, which will match the future user
requirements in spaceborne remote sensing, the
scientific objectives of M0MS-02 flown in
connection with the D-2 mission can be summarized
as follows:
Under technical aspects:
- use and testing of newest CCD - array technology,
featuring smaller pixels and longer scan lines;
- grouping of two spectral bands in the focal
plane of one optic by using spectral filter
plates mounted directly on the arrays;
- development of onboard data compression methods
(2 to 1) enabling the data to be transmitted
without a significant loss of their informa
tion content via the existing telemetry links;
- data acquisition in higher latitudes (Europe)
with their specific albedo and surface pattern
conditions.
Under application oriented aspects:
With regard to the application oriented part of
the missions the scientific objectives aim at the
combination of geometric, i.e. topographic infor
mation with multispectral data for thematic,
photogrammetric and cartographic purposes.
REFERENCES
1. Bodechtel, J. et al.: M0MS-01 Missions and
Results, American Institute of Aeronau
tics and Astronautics Progress Series,
volume 97, pp. 524 - 535, New York, 1935.
2. Kaufmann, H., J. Bodechtel, R. Haydn: Spectral
Significance of MOMS versus Landsat Data
and Future Aspects, Preliminary Results,
IGARSS Symposium, Strasbourg, France, vol.
1, pp. 39 - 44, ESA Sp-215, 1984.
3. Henkel, J., K. Bothmann, G. Sussenguth:
Radiometric Correction of MOMS-CCD Images,
proc. EARSeL/ESA Symposium "European
Remote Sensing Opportunities", Strasbourg,
France 1985, ESA SP-233.
4. Henkel, J., H. Kaufmann: Calibration of MOMS-
CCD Data and Qualitative Test Using TM
Data, proc. 3 rd International Coll, on
Spectral Signatures of Objects in Remote
Sensing, Les Arcs, France, Dec. 1985, ESA
SP-247.
5. Salomonson, V.V., W. Hallada, J. Bodechtel:
Preliminary Quantitative Comparisons in
the Performance of the Tandsat Thematic
Mapper and the Modular Optoelectronic
Multispectral Scanner (MOMS) pres.
American Society of Photograrnmetry Meeting,
Indianapolis, Indiana, U.S.A., Sept. 1985.