View source for atrem

{{DavinciWiki_Function|
Calls vanilla database and gets required fields to remove CO2 and water vapor contributions to the radiance spectra.  This only works on 143 point TES spectra.  This function depends on 2 external programs: vanilla and correlated-k code (see [[co2_new]] for more information).  Usage is restricted to linux.
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Arguments:
Vanilla select fields, vanilla database directory.
 
Return Value:
TES measured radiance with radiative contributions due to CO<sub>2</sub> and H<sub>2</sub>O vapor removed.  Optionally, the original input values from the vanilla call can be returned as well in a structure.
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[[Syntax]]: atrem("vanilla select fields","vanilla data directory", [str &#61; 1])
 
"vanilla select fields":  String containing conditions that restrict the input data

"vanilla data directory": Path where vanilla DATASET file is contained

struct: return a structure with individual vanilla input components as well as corrected radiance - 0 (default) returns radiance only, 1 returns individual components

atrem only works on 143 point single scan TES data (Use "scan_len 1 1" in select string)
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 dv> data &#61; atrem("ock 5129 5129 ick 1572 1572 detector 1 3 scan_len 1 1","/tes/mapping/data/p5123/",struct &#61; 1)
 Apparent file size: 167x3x1
 Read ASCII file: 167x3x1
 Apparent file size: 1x143x1
 Read ASCII file: 1x143x1
  Reading Corrk
  done
  1
  2
  3
 Apparent file size: 95x3x1
 Read ASCII file: 95x3x1
 struct, 6 elements
     rad: 3x143x1 array of double, bsq format [3,432 bytes]
     pt: 3x21x1 array of double, bsq format [504 bytes]
     psurf: 1x3x1 array of double, bsq format [24 bytes]
     Tsurf: 1x3x1 array of double, bsq format [24 bytes]
     emission: 1x3x1 array of double, bsq format [24 bytes]
     rad_original: 3x143x1 array of double, bsq format [3,432 bytes]

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Plot showing an original and corrected spectrum of the output structure example above.

The 15 micron CO<sub>2</sub> band will not be fully corrected.
[[Image:atrem1.png]]
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*[[pt]]
*[[bbr]]
*[[co2_new]]
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*[[co2_new]]
*[[surfcalc]]
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*tes_science.dvrc
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Bandfield, J. L., and M. D. Smith (2003), Multiple emission angle surface-atmosphere separations of Thermal Emission Spectrometer data, ''Icarus'', '''161''', 47-65.
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[[category:Functions]]
[[category:User Defined Functions]]
[[category:TES Science]]