NDLI: Calibration of 1064 nm channel of LITE using playa surface returns

Content Provider	IEEE Xplore Digital Library
Author	Cooley, T.W. Reagan, J.A.
Copyright Year	1995
Description	Author affiliation: Centre d'Etudes et de Recherches de Toulouse, France (Cooley, T.W.; Reagan, J.A.)
Abstract	The Lidar In-space Technology Experiment (LITE), the first NASA spaceborne atmospheric lidar yielded data on atmospheric aerosols and surface reflectance. The IR 1064 nm channel did not have a sufficiently strong Rayleigh backscatter to enable calibration off the molecular atmosphere as did the 532 nm and 355 nm channels, so surface returns were considered for calibrating the IR channel. The uses of LITE surface returns have been investigated with related laser altimeter measurements from the Race Track playa in Death Valley, CA examined by these authors in preparation for the LITE mission. The LITE surface returns from Rodgers dry lake are compared with the previous measurements. Two approaches of calibrating the IR channel are considered. First, the reflected signal variance is determined for calibration of the 1064 mn channel surface returns off the playa. This requires that the ratio of the reflectance between the green and IR channels be known from an additional data source. Passive reflectance measurements were made of the playa to establish this ratio with a non-backscatter geometry which adds to the uncertainties of the result. The second approach is to calibrate using the absolute value of the 1064 nm backscatter reflectance. This can be inferred from passive measurements and modeling of the playa angular reflectance characteristics. The effects of errors introduced by the lidar system, correlative optical depth measurements and surface reflectance measurements and modeling are considered to obtain the 1064 nm channel final calibration error margin using both reflectance calibration approaches. The basic lidar relationships are reviewed, and the error dependencies in the lidar equation are discussed as they apply to the LITE surface returns.
Starting Page	2326
Ending Page	2328
File Size	309684
Page Count	3
File Format	PDF
ISBN	0780325672
DOI	10.1109/IGARSS.1995.524183
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-07-10
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Reflectivity Laser radar Backscatter Space technology NASA Aerosols Atmosphere Surface emitting lasers Atmospheric measurements
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in