Spectral Irradiance Calibration in the Infrared. XV. Absolute Calibration of Standard Stars by Experiments on theMidcourse Space Experiment

2004 ◽  
Vol 128 (2) ◽  
pp. 889-910 ◽  
Author(s):  
S. D. Price ◽  
Charles Paxson ◽  
Charles Engelke ◽  
Thomas L. Murdock
Keyword(s):  
Space Experiment ◽  
Spectral Irradiance ◽  
Absolute Calibration

scholarly journals Spectral Irradiance Calibration in the Infrared. XIV. The Absolute Calibration of 2MASS

2003 ◽  
Vol 126 (2) ◽  
pp. 1090-1096 ◽  
Author(s):  
Martin Cohen ◽  
Wm. A. Wheaton ◽  
S. T. Megeath
Keyword(s):  
Spectral Irradiance ◽  
Absolute Calibration ◽  
The Absolute

Spectral Irradiance Calibration in the Infrared. XII. Radiometric Measurements from the [ITAL]MIDCOURSE SPACE EXPERIMENT[/ITAL][ITAL]Midcourse Space Experiment[/ITAL]

2001 ◽  
Vol 121 (2) ◽  
pp. 1180-1191 ◽  
Author(s):  
Martin Cohen ◽  
Russell G. Walker ◽  
Sumita Jayaraman ◽  
Elizabeth Barker ◽  
Stephan D. Price
Keyword(s):  
Space Experiment ◽  
Spectral Irradiance ◽  
Radiometric Measurements

scholarly journals SI-traceable Spectral Irradiance Radiometric Characterization and Absolute Calibration of the TSIS-1 Spectral Irradiance Monitor (SIM)

2020 ◽  
Vol 12 (11) ◽  
pp. 1818 ◽  
Author(s):  
Erik Richard ◽  
Dave Harber ◽  
Odele Coddington ◽  
Ginger Drake ◽  
Joel Rutkowski ◽  
...  
Keyword(s):  
Space Station ◽  
Standard Uncertainty ◽  
Space Physics ◽  
Operating Conditions ◽  
Spectral Irradiance ◽  
Absolute Calibration ◽  
Component Level ◽  
Current Implementation ◽  
Direct Laser ◽  
Operational Envelope

The current implementation for continuous, long-term solar spectral irradiance (SSI) monitoring is the Total and Spectral Solar Irradiance Sensor (TSIS-1) Spectral Irradiance Monitor (SIM) that began operations from the International Space Station (ISS) in March 2018 and nominally provides an SSI spectrum every 12 h. Advances in both instrument design and spectral irradiance calibration techniques have resulted in the TSIS-1 SIM achieving higher absolute accuracy than its predecessor instrument in the wavelength range (200–2400 nm). A comprehensive detector-based Spectral Radiometer Facility (SRF) was developed in collaboration with the US National Institute for Standards and Technology (NIST) to ensure the ties to spectral SI standards in power and irradiance. Traceability is achieved via direct laser calibration of a focal plane electrical substitution radiometer (ESR) against a cryogenic radiometer in power and also irradiance responsivity via calibrated apertures. The SIM accuracy definition followed an absolute sensor approach based on a full radiometric measurement equation where component-level performance characterizations and calibrations were quantified with an associated uncertainty error budget and verified by independent measurements for each parameter. Unit-level characterizations were completed over the full operational envelope of external driving factors (e.g., pointing and temperature ranges) and were allowed for the independent parameterization of sub-assembly performance for expected operating conditions. Validation and final instrument end-to-end absolute calibration in the Laboratory for Atmospheric and Space Physics (LASP)-SRF achieved low combined standard uncertainty (uc < 0.25%, k = 1) in spectral irradiance.

The effect of back-melting on the continuity of crystallographic orientation and composition in HgZnTe

1992 ◽  
Vol 50 (2) ◽  
pp. 1696-1697
Author(s):  
H.J. Zuo ◽  
M.W. Price ◽  
R.D. Griffin ◽  
R.A. Andrews ◽  
G.M. Janowski
Keyword(s):  
Directional Solidification ◽  
Space Shuttle ◽  
Solidification Process ◽  
Space Experiment ◽  
Infrared Detection ◽  
Directionally Solidified ◽  
Crystallographic Defects ◽  
Semiconducting Alloys ◽  
Uniform Composition ◽  
Growth Experiments

The II-VI semiconducting alloys, such as mercury zinc telluride (MZT), have become the materials of choice for numerous infrared detection applications. However, compositional inhomogeneities and crystallographic imperfections adversly affect the performance of MZT infrared detectors. One source of imperfections in MZT is gravity-induced convection during directional solidification. Crystal growth experiments conducted in space should minimize gravity-induced convection and thereby the density of related crystallographic defects. The limited amount of time available during Space Shuttle experiments and the need for a sample of uniform composition requires the elimination of the initial composition transient which occurs in directionally solidified alloys. One method of eluding this initial transient involves directionally solidifying a portion of the sample and then quenching the remainder prior to the space experiment. During the space experiment, the MZT sample is back-melted to exactly the point at which directional solidification was stopped on earth. The directional solidification process then continues.

Validation of GNSS Receiver Chain Absolute Calibration

2018 ◽  
Author(s):  
Esteban Garbin ◽  
Piotr Krystek ◽  
Ricardo Piriz ◽  
Pierre Waller ◽  
Pascale Defraigne ◽  
...  
Keyword(s):  
Absolute Calibration ◽  
Gnss Receiver

Scientific equipment for the space experiment «Pipe» on the RS of the ISS

2009 ◽  
Vol 15 (3) ◽  
pp. 5-10
Author(s):  
A.G. Kostornov ◽  
◽  
G.A. Frolov ◽  
A.A. Shapoval ◽  
A.L. Moroz ◽  
...  
Keyword(s):  
Space Experiment ◽  
Scientific Equipment
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