Scisat%20Test%20Readiness%20Review

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Scisat Test Readiness Review

• MAESTRO Evaluation and Verification Tests

University of Toronto 29 January 2003
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• Instrument Line Shape
•  
• Objective To measure the characteristic
  instrument line shape for both spectrometers. To
  do this the field of view must be filled with a
  known monochromatic source, and/or a source with
  sharp known emission lines. This test will allow
  for dispersion relation calculation, as well as
  characterization of the instrument line shape.
  This test is divided into three sub-tests, the
  results of which will be combined to get ILS
  characterization.
• Setup 4.1A Pre-TVAC using backscatter port, with
  lasers beam expander
• 4.1B Pre-TVAC using backscatter port, with Neon
  lamp spectralon
• 4.1C TVAC level using solar port, with HgXe lamp

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• 4.3 Field Of View Tests
•  
• Objective The objective of this test is to probe
  the extent and co-alignment of both spectrometer
  slits fields of view, and to check spectrometer
  focusing of various areas of the field of view.
  As the incident collimated beam angle is changed,
  different areas of the field of the slit are
  probed. Vertical movement (perpendicular to the
  long axis of the slit) should result in a small
  spectral displacement of the observed spectra
  (corresponding to the height of the slit image on
  the detector array), and this movement should be
  the same for all horizontal incident angles.
  Otherwise, there may be angular positioning
  problems with the grating and/or detector.
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• Setup 4.3A Pre-TVAC level with solar port, using
  alignment jig
• 4.3B Pre-TVAC level with backscatter port,
  using green laser
• 4.3C TVAC level with solar port, using Xe lamp
  pinhole field

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 4.4 Absolute Sensitivity Test Objective To
verify the response of the detectors to a
calibrated uniform radiance source. This will
allow for the determination of detector gain and
linearity as well as the absolute
intensity. Setup 4.4A TVAC Level, Solar port,
using QI lamp attenuator wheel4.4B Pre-TVAC
Level, Backscatter port, using QI lamp
spectralon4.4C Pre-TVAC level, solar port, using
QI lamp spectralon
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 4.5 Response to a known absorber Objective
To measure the detector signals obtained by the
absorption of radiance from a continuous
wavelength source by known gasses.  Setup
TVAC Level, Solar Port. The ozone cell should be
filled to its maximum level by activating the
Tesla coil for ½ hour. This should generate
approximately 8.04X1021 molec/cm2 of ozone. The
following pressure settings are to be used for
NO2 
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4.6 Noise Levels Objective To determine the
noise level of the detectors under zero light
conditions and various temperatures. Setup
System Level 4.8 Polarization Test Objective
To determine the amount of linear polarization
introduced by the instruments polarizers. Setup
System level, solar port 
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 4.9 Calibration Rod Performance Objective To
verify the proper functioning of the heated
calibrating rods on the diffraction gratings in
order to verify the reference scan interpolation
requirements. Setup in TVAC, using solar port
with green laser 4.10 Internal Diodes
Test Objective To test the functionality of
MAESTROs internal test diodes by turning them on
and off in all possible combinations and
observing the response on the detectors. Setup
in TVAC
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4.11 Housekeeping tests Objective To confirm
the proper functioning of the instrument by
looking at telemetry response to various
commands. Setup inside and outside TVAC