 |
| Titel |
Real-time remote detection and measurement for airborne imaging spectroscopy: a case study with methane |
| VerfasserIn |
D. R. Thompson, I. Leifer, H. Bovensmann, M. Eastwood, M. Fladeland, C. Frankenberg, K. Gerilowski, R. O. Green, S. Kratwurst, T. Krings, B. Luna, A. K. Thorpe |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 10 ; Nr. 8, no. 10 (2015-10-19), S.4383-4397 |
| Datensatznummer |
250116644
|
| Publikation (Nr.) |
 copernicus.org/amt-8-4383-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| Localized anthropogenic sources of atmospheric CH4 are highly
uncertain and temporally variable. Airborne remote measurement is an
effective method to detect and quantify these emissions. In a campaign
context, the science yield can be dramatically increased by real-time
retrievals that allow operators to coordinate multiple measurements of the
most active areas. This can improve science outcomes for both single- and
multiple-platform missions. We describe a case study of the NASA/ESA
CO2 and MEthane eXperiment (COMEX) campaign in California during June
and August/September 2014. COMEX was a multi-platform campaign to measure
CH4 plumes released from anthropogenic sources including oil and gas
infrastructure. We discuss principles for real-time spectral signature
detection and measurement, and report performance on the NASA Next Generation
Airborne Visible Infrared Spectrometer (AVIRIS-NG). AVIRIS-NG successfully
detected CH4 plumes in real-time at Gb s−1 data rates,
characterizing fugitive releases in concert with other in situ and remote
instruments. The teams used these real-time CH4 detections to
coordinate measurements across multiple platforms, including airborne
in situ, airborne non-imaging remote sensing, and ground-based in situ
instruments. To our knowledge this is the first reported use of real-time
trace-gas signature detection in an airborne science campaign, and presages
many future applications. Post-analysis demonstrates matched filter methods
providing noise-equivalent (1σ) detection sensitivity for 1.0 %
CH4 column enhancements equal to 141 ppm m. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|