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
2003 ◽  
Vol 126 (2) ◽  
pp. 1090-1096 ◽  
Author(s):  
Martin Cohen ◽  
Wm. A. Wheaton ◽  
S. T. Megeath

2001 ◽  
Vol 121 (2) ◽  
pp. 1180-1191 ◽  
Author(s):  
Martin Cohen ◽  
Russell G. Walker ◽  
Sumita Jayaraman ◽  
Elizabeth Barker ◽  
Stephan D. Price

2020 ◽  
Vol 12 (11) ◽  
pp. 1818 ◽  
Author(s):  
Erik Richard ◽  
Dave Harber ◽  
Odele Coddington ◽  
Ginger Drake ◽  
Joel Rutkowski ◽  
...  

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.


Author(s):  
H.J. Zuo ◽  
M.W. Price ◽  
R.D. Griffin ◽  
R.A. Andrews ◽  
G.M. Janowski

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.


Author(s):  
Esteban Garbin ◽  
Piotr Krystek ◽  
Ricardo Piriz ◽  
Pierre Waller ◽  
Pascale Defraigne ◽  
...  

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

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