Computer programs read magnetic-tape data bases and computer meteorological profiles for any position, time, and height (from zero to 25 km). System assists in analyses of distortion of information obtained from aircraft-mounted or spacecraft-mounted electromagnetic sensors

Brown, C.

Fowler, M.

Johnson, D.

Spiegler, D.

English

NASA Technical Reports Server

•	 June 1975	 B75-10093 
NASA TECH BRIEF 
Marshall Space Flight Center 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
Four-Dimensional Worldwide Atmospheric Models: ANYPT and ANYRG 
.
The problem: 
A system was needed to assist in the analysis of the 
distortion of information obtained from aircraft-
mounted or spacecraft-mounted electromagnetic 
sensors. This distortion is caused by atmospheric 
parameters, mainly moisture. 
The solution: 
Two computer programs, ANYPT and ANYRG, 
were developed to read magnetic-tape data bases and 
to compute meteorological profiles for any position, 
time, and height (from zero to 25 km). 
How it's done: 
The data base utilized by ANYPT contains one file 
for each month of the year. Each of these files 
contains records representing atmospheric parameter 
values at 3,490 grid points over the globe. Each record 
contains the pressure means and variances, the 
temperature means and variances, the moisture 
means and variances, and the density means and 
variances, for any height from zero to 25 km at 1-km 
intervals. Using this global data set, ANYPT will 
generate for any month unique meteorological profiles 
consisting of tables of monthly means and variances 
for pressure, temperature, absolute humidity, and 
density, for any latitude, longitude, and level up to 
25 km. Where data for a selected grid point is not 
available, ANYPT will take existing data and, using 
horizontal interpolation schemes, apply it to any 
location on the globe. In addition, ANYPT contains 
the option of curve fitting the profiles generated, for 
any data point so that meteorological parameter
values may be extrapolated to any height in the range 
from zero to 25 km. 
Program ANYRG accepts as input data curve-fit 
coefficients for each meteorological parameter aver-
aged over each month and selected grid points within 
45 homogeneous moisture regions defined across the 
globe. ANYRG then generates meteorological profiles 
at specific times and locations from the coefficients of 
the curve-fitted region data. The values produced are 
not unique for each latitude and longitude, for they 
are constant throughout a homogeneous moisture 
region. However, the execution efficiency of ANYRG, 
relative to ANYPT, recommends that ANYRG be 
used in those applications where lesser precision in 
generated profiles can be tolerated. 
Notes: 
1. These programs were written in FORTRAN V for 
the UNIVAC 1108 computer. 
2. Inquiries concerning these programs should be 
directed to: 
COSMIC 
112 Barrow Hall 
University of Georgia 
Athens, Georgia 30601 
Reference: MFS-22838 
Source: D. Johnson and C. Brown
Marshall Space Flight Center and
D. Spiegler and M. Fowler of

Environmental Research & Technology

under contract to

Marshall Space Flight Center

(MFS-22838) 
.
Categories: 09 (Mathematics and 
Information Sciences) 
03 (Physical Sciences) 
This document was prepared, under the sponsorship of the National
	
Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States
	
information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States
	
will be free from privately owned rights.
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Four-dimensional worldwide atmospheric models: ANYPT and ANYRG

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