
Proceedings Paper
Spaceborne linear arrays of 512x3 microbolometersFormat | Member Price | Non-Member Price |
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Paper Abstract
Details on the first linear arrays of 512×3 VOx microbolometers operating in space are reported. Arrays of this format are
suited for remote sensing where relative motion between the spacecraft and target provides an inherent scanning
mechanism. To take full advantage of the linear format, the array is built on a custom readout electronics that enables
simultaneous integration of all pixels for scanning periods of up to 140 ms. The output signal from each pixel is digitized
to 14 bits using a voltage-to-frequency conversion mechanism. Two arrays, integrated into two spectrally distinct
radiometric packages, provide for coregistration of infrared images in three bands centered at 3.8, 10.85, and 11.85 μm
for the retrieval of fire and sea surface temperatures. Analysis of the downlinked data confirms the reliable in-orbit
operation and consistency with pre-launch characteristics for both arrays. Algorithms have been developed to perform
post processing and absolute radiometric calibration of images in all bands. Image deconvolution using Wiener filtering
was found effective in recovering the signal loss incurred in the active pixels when observing high temperature events.
The in-flight gain and offset values were evaluated for all pixels by means of deep space measurements and cross
calibration with reference spaceborne sensors. Preliminary assessment of the images calibrated using these values
showed that they are in agreement with those retrieved from GOES sensor.
Paper Details
Date Published: 9 March 2013
PDF: 12 pages
Proc. SPIE 8614, Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS and Nanodevices XII, 86140N (9 March 2013); doi: 10.1117/12.2004641
Published in SPIE Proceedings Vol. 8614:
Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS and Nanodevices XII
Rajeshuni Ramesham; Herbert R. Shea, Editor(s)
PDF: 12 pages
Proc. SPIE 8614, Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS and Nanodevices XII, 86140N (9 March 2013); doi: 10.1117/12.2004641
Show Author Affiliations
Published in SPIE Proceedings Vol. 8614:
Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS and Nanodevices XII
Rajeshuni Ramesham; Herbert R. Shea, Editor(s)
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