SUBMIT TO: SD102 (Imaging Specrometry V,
			Sylvia S. Shen and Michael R. Descour,
			Special Session on MTI)

TITLE: MTI On-orbit Calibration

AUTHORS:
William B. Clodius,
Steven C. Bender,
Barham W. Smith,
NIS-2, MS C323, Los Alamos National Laboratory, Los Alamos, NM 87545, FAX:
505/667-8315,

R. Rex Kay,
Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-0972, FAX:
505/844-0793

Clodius: Phone: 505/665-9370, Email: wclodius@lanl.gov
Bender: Phone: 505/667-4944, Email: sbender@lanl.gov
Smith: Phone: 505/667-1585, Email: bwsmith@lanl.gov
Kay: Phone: 505/845-9472, Email: RRKAY@sandia.gov

PRESENTATION: Oral

ABSTRACT TEXT:

The Multi-spectral Thermal Imager (MTI) will be a satellite based imaging
system that will provide images in fifteen spectral bands covering large
portions of the spectrum from 0.45 through 10.7 microns. An important goal
of the mission is to provide data with state of the art radiometric
calibration. The on-orbit calibration will rely on the pre-launch ground
calibration and will be maintained by vicarious calibration campaigns.
System drifts before and between the vicarious calibration campaigns will
be monitored by several on-board sources that serve as transfer sources in
the calibration of external images. These sources can be divided into two
groups: a set of sources at an internal aperture, primarily intended to
monitor short term drifts in the detectors and associated electronics; and
two sources at the external aperture, intended to monitor longer term
drifts in the optical train before the internal aperture. The steps needed
to transfer calibrations to image products, additional radiometric data
quality estimates performed as part of this transfer, and the data products
associated with this transfer will all be examined.

KEY WORDS: Multispectral, image, satellite, radiometric calibration, data
products

BRIEF BIOGRAPHY:

William Clodius completed his doctorate at the University of Delaware in
1982, on the photodetachment of negative ions. This was followed by
post-doctoral positions at Texas Tech and the University of Utah. He has
held a position at Los Alamos National Laboratory since 1984. He is
currently in the Space and Remote Sensing Sciences Group at LANL.