McIDAS Programmer's Manual
Version 2003

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HIRSTAUL

HIRS transmittance coefficients.

HIRSTAUL is a binary file containing 506-word records provided by the sensor source. Each sensor source has 20 records:

This file is supplied with McIDAS-X.

For HIRS transmittance coefficients Application Program Interfaces (APIs), refer to the API functions list at the end of this section.

Word allocation for records 1-19

Word Description

0 - 199

carbon dioxide transmittance coefficients

200 - 319

carbon dioxide angular correction coefficients

320 - 325

continuum transmittance coefficients

326 - 339

water vapor transmittance coefficients

340 - 419

ozone transmittance coefficients

420 - 499

ozone angular correction coefficients

500 - 505

flags indicating whether to use coefficients

Word allocation for record 20

Word Description

0 - 19

central wave numbers of the channels

20 - 59

coefficients for the Planck function

60 - 99

band correction coefficients

100 - 139

reserved

140 - 144

solar coefficients

145 - 157

flux coefficients

158 - 179

reserved

180 - 187

synthetic coefficients for the surface temperature

188 - 189

reserved

190 - 197

empirical coefficients for the surface temperature

198 - 505

reserved

API functions

Function Description

pfcoef

retrieves HIRS Planck function, solar, flux and surface temperature coefficients


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