Read one file of Oort radiosonde data. Each file contains data for all stations
for one month. The number of stations changes from month to month.

This program is a modified version of the test-read code "read.f" (GFDL program
reado) provided by NCAR.

Input variables:

character*(*) filename ! name of the file to be read
integer maxsta ! max number of stations (soundings) possible
integer nvarbs, nlevels ! number of variables and P-levels in each sounding

Output variables:

real lon(maxsta), lat(maxsta) ! longitudes / latitudes of the stations
real data(nvarbs, nlevels, maxsta) ! sounding data
integer nr ! actual number of stations with data


*** Documentation ***

Oort radiosonde data (NCAR Data Support Section dataset DS431.0)

From: jrl@GFDL.GOV (John Lanzante) via joseph@ncar.ucar.edu (Dennis Joseph)

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Datasets: Monthly Rawinsonde Station Covariances - 11 terms
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Variables: Su Sv ST Sz Sq Srh Nu NT Nz Nq Nrh
The variables are u, v, T, z, q, and rh.
S = sum and N = number of observations.
NOTE: Nv is not needed since Nv=Nu.
NOTE: z is given as the geopotential height departure
(z - zREF) from NMC standard atmosphere (zREF) in gpm.
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Time Period: May 1958 to December1989
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File Structure: Files named yyyy.mm.ttz where yyyy=four digit year,
mm=two digit month (leading zeros) and tt=time (either
00,06,12 or 18 GMT); z indicates GMT.
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Units: m/s m/s C m g/kg % num num num num num
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Original Source: GFDL, Bram Oort (retired)
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Bibliography:
Oort, A., 1983: Global Atmospheric Circulation Statistics, 1958-1973,
NOAA Professional Paper 14, U.S. Department of Commerce [data set
has been updated since this publication].
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GFDL Contact: John Lanzante or Gabriel Lau
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