Computer program is written to display Nimbus high resolution infrared radiometer data in optimum form for experiment usage. Program produces three maps for Nimbus experimental data. Functions of program are to process data and prepare print maps from modified temperature measurements

Powell, H. W.

English

NASA Technical Reports Server

October 1972	 B72-10606 
NASA TECH BRIEF	 - IT  
N7P Goddard 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. 
Program To Produce Horizontal Stereographic Print Maps 
From NIMBUS HRIR Data 
The problem: 
To display NIMBUS High Resolution Infrared Radio-
meter data in an optimum form for experimental usage. 
The solution: 
This program produces three maps for the NIMBUS 
experimental data: 
1. Temperature - Average "blackbody" temperature 
in degrees kelvin. 
2. Population - The number of measurements used 
in the temperature averaging. 
3. Below Threshold - The number of measurements 
that were below the radiometers threshold. 
How it's done: 
The program has two functions - processing the data 
and preparing print maps from them. The temperature 
measurements are modified in the following two ways 
before being used: 
1. Each swath is examined for measurements that are 
flagged as "below threshold". 
2. Each swath is then passed through McMillens filter 
to remove the 200-Hz telemetry noise component.
The output from several swaths forms the input for 
the maps. The program reads-in this information as well 
as map center, scaling factor, and time intervals, and 
translates the data into an output array for printing. 
This program has potential application to any of a 
wide range of ecological and environmental studies such 
as sea and air sampling, pollution, earth resources, etc. 
Notes: 
1. This program is written in FORTRAN IV (549o) and 
ASSEMBLER (46 17o) for use on the IBM-360 computer 
and 1403 printer. 
2. Inquiries concerning this program should be directed 
to:
COSMIC 
112 Barrow Hall 
University of Georgia 
Athens, Georgia 30601 
Reference: GSC-1 1397 
Source: Hugh W. Powell of 
Programming Methods, Inc. 
under contract to
Goddard Space Flight Center 
(GSC-1 1397) 
Category 09 
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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Program to produce horizontal stereographic print maps from Nimbus HRIR data

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