NICMOS Target Acquisition Test

Details NICMOS Target Acquisition Test NICMOS Target Acquisition Test

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7038s&link_type=abstract

HST Proposal ID #7038

Computer Science

Hst Proposal Id #7038

Scientific paper

This test will verify the ability of NICMOS and NSSC-1 Flight S/W to perform Mode-2 {onboard autonomous} target acquisitions in support of coronographic imaging. The efficacy of Target Location, Image Centrartion and Coordinate Transformation {field distortion an SI-to-FGS} on-board software will be evaluated. Flight S/W data table updates derived from the pre and post target qcquisition images and FGS data may follow the execution of this test as noted in SMO-2021/2.13.9. This test is designed confirm the ability of the Mode-2 acquisition process of positioning the brighest well-exposed point target in a 128x128 pixel acquisition region within 1/4 pixel {18.5mas} of the center of the coronographic hole as described in SMOV requirement F.2.5.4.2.1. This requirement is derived from CEI specification 3.2.1.1.1. In addition we will explore the operating characteristics of the target acquisition process in the regime of a low S/N {underexposed} targets and saturated targets. . In addition to a point target, a close {< 1"} double star will well known flux ratios and component geometries, and a bright point-like target in a complex {diffuse} extended field will be oberved.

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