Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

damen, m. c. j.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856662364

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: VI, Seiten 959-1074

Year of publication:: 2016

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856662364

Signature of the source:: ZS 312(26,7,3)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: Invited papers

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Comparison of MOMS and Thematic Mapper, data for geoscientific application and aspects for future development of multispectral sensors. J. Bodechtel

Document type:: Multivolume work

Structure type:: Chapter

986 - estimate the radiometric resolution and dynamic range by calculating statistics and entropy; - evaluate the spatial resolution and dynamic range by calculating statistics and entropy; - evaluate the spatial resolving powers by o performing an edge analysis, o estimating point spread functions, - compare the spectral capabilities, - analyse the MOMS within scan noise, MOMS and TM between scan noise and signal-to-noise ratios. Tables 2, 3, 4 and 5 show different results ob tained in the testsites. Fig. 6 shows an enlarged section of the testsite in Kenya, processed by NASA/GSFC. The MOMS-01 in frared band is compared to TM band 4. During the STS-7 mission the MOMS infrared band turned out to be out of focus. Due to the modular concept the focal length of the dual lens optics could be adjusted new for the upcoming STS-11/41-B mission by mounting a glass plate between optics an arrays. However, the band still is slightly out of focus. During the Kenya data take as shown in this example M0MS-01 was operating in the lower gain mode of the two, which could be selected by the MOMS mission specialists at Johnson Space Flight Center in Houston. Thus the higher spatial resolution of MOMS versus TM is compensated by a lower dynamic range (see also Fig. 5). Complementary to the investigations of the working group at NASA/GSFC the data comparison was carried out at the AGF-Working Group Geoscientific Remote Sensing by employing the following approach: - display and visual comparison of MOMS 600 and 900 nm bands and TM bands 2+3 (2+3 and average calculated) and 4, - MOMS 900/600 nm and TM 4/2+3 ratio processing and visual comparison, - MOMS and TM IHS (Intensity, Hue, Saturation) processing to generate color renditions (see Fig. 7 and 8), - calculation of histograms (see Fig. 9), - calculation of scattergrams (see Fig. 10). Figures 7-10 show the results obtained in the testsite Atacama desert, Chile. Figure 7 and 8: MOMS and Thematic Mapper IHS proessing of a section of the testsite Atacama desert. MOMS and Thematic Mapper data have been treated with equal processing methods for comparing the system's performance for thematic mapping. Different colors of the same surface features are due to a different portioning and range of spectral bands (see also Fig. 5). MOMS features - as given by the specifications - a higher spatial resolu tion than TM, which in this specific example is not being compensated by a lower dynamic range, because MOMS was switched to gain level 2 (see also figures 9 and 10). The slight defocussing of the MOMS infrared band does not afreet the image quality as the resolution depends on the highest resolving data used within one processing, which is the 600 nm visible band. The sun azimuth angle between both scenes is nearly perpendicular, thus different geological features are enhanced. RESULTS In the framework of the cooperative effort between NASA and BMFT MOMS'and Thematic Mapper's system performances have been compared in terms of spatial, spectral and radiometric resolving powers and noise characteristics by NASA. The evaluations at the AGF-Working Group Geoscienti- fic Remote Sensing were focussed on preparing application - oriented computer processings of both systems under equal conditions and comparing their applicability for thematic mapping. The results can be summarized as follows: - when operating in gain level 1, MOMS has a lower dynamic range then TM, whereas, when switched to gain 2, the dynamic ranges are comparable. - the computer processings prove MOMS to have a higher spatial resolution, when the exactly focussed visible band is used directly or processings including this band. The infrared band is out of focus, thus point spread function calculations indicate a lower spatial resolving power of MOMS versus TM. The spatial resolution of MOMS decreases from the left to the right side of one detector array. - the noise variances in both MOMS and TM are similar, but since MOMS is a 7-bit system the percentage of the image radiometric information containing noise is greater and the SNR of TM is higher. - the noise pattern in MOMS images has a vertical as well as a horizontal structure. The vertical structure is due to miscalibration of individual detectors and changing response across detector arrays. There is also a significant difference in noise variances between odd and even detectors. The absolute radiometric correction applied to the data for the recent evaluations at the AGF- Working Group improves the pixel grey value variation within one scan line of maximum 3-4 in raw data to 1 - 2 as could be found by analyzing image profiles. - the geometry of the MOMS instrument was found to be very stable. Although geometrically corrected TM data has a pixel spacing of 28,5 meters, subsets of the TM images could be registered to the MOMS images with an average pixel error of 10 meters. The results elaborated until now show the two instruments to be to a certain extend similar in the spectral bands that were compared. Although the MOMS scanner has a smaller IF0V, its lower modulation transfer function versus TM compensates this advantage especially surface features under low sun angles or low contrast phenomena have been observed with the instrument being switched to gain level 1. Operating in gain mode 2 an improvement in resolving power can be stated. The deficiencies are due to the CCD arrays used (Reticon CCPD 1728). For the upcoming M0MS-02 to be tested in space aboard the D-2 mission actual sensor developments will be used featuring more pixels per scan line and a better overall performance (see following chapter). Optoelectronic arrays have already been tested and evaluated concerning their applicability for space- borne remote sensing in the framework of a phase-B study on Stereo-MOMS, the operational representative of the MOMS family for the Polar Platform in the mid-nineties. TECHNICAL SPECIFICATIONS AND MISSION OBJECTIVES OF M0MS-02 MOMS-02, as suggested for a space flight aboard the D-2 mission, will feature the following technical parameters: - three nadir looking multispectral bands (560 + 20

Access restriction

Copyright

fullscreen: Remote sensing for resources development and environmental management (Volume 3)

Multivolume work

Volume

Chapter

Chapter

Table of contents

Cite and reuse

Volume

Chapter

Image

Image fragment

Citation links

Citation recommendation