Engineering topics

Obrien, S. O.

Publications and source records attributed to Obrien, S. O..

6 records

NASA NTRS1981

Computer program documentation for the patch subsampling processor

The programs presented are intended to provide a way to extract a sample from a full-frame scene and summarize it in a useful way. The sample in each case was chosen to fill a 512-by-512 pixel (sample-by-line) image since this is the largest image that can be displayed on the Integrated Multivariant Data Analysis and Classification System. This sample size provides one megabyte of data for manipulation and storage and contains about 3% of the full-frame data. A patch image processor computes means for 256 32-by-32 pixel squares which constitute the 512-by-512 pixel image. Thus, 256 measurements are available for 8 vegetation indexes over a 100-mile square.

Nieves, M. J.↗

NASA NTRS1980

Tape merge/copy processor

The TAPMRG processor merges or copies data files from one or more tapes onto a single output tape.

Obrien, S. O.↗

NASA NTRS1980

Limited Area Coverage/High Resolution Picture Transmission (LAC/HRPT) tape IJ grid pixel extraction processor user's manual

The program, LACREG, extracted all pixels that are contained in a specific IJ grid section. The pixels, along with a header record are stored in a disk file defined by the user. The program will extract up to 99 IJ grid sections.

Obrien, S. O.↗

NASA NTRS1980

Limited Area Coverage/High Resolution Picture Transmission (LAC/HRPT) data vegetative index calculation processor user's manual

The program, LACVIN, calculates vegetative indexes numbers on limited area coverage/high resolution picture transmission data for selected IJ grid sections. The IJ grid sections were previously extracted from the full resolution data tapes and stored on disk files.

Obrien, S. O.↗

NASA NTRS1980

EROS to universal tape conversion processor

The function of the EROS processor is to allow a user to select a specific area from a full frame LANDSAT image which is written on tape in the EROS format. The area of interest is read from the EROS formatted tape and converted to the JSC Universal format and written onto another tape. This tape can then be read by the IMDACS processing system and normal analysis can be performed.

Obrien, S. O.↗

NASA NTRS1980

Limited Area Coverage/high Resolution Picture Transmission, LAC/HRPT tape conversion processor user's manual

The program, LACSEG, converts LAC/HRPT data tapes to the CSC defined Universal format. The Universal formatted data tape is then processed the normal way by the FAS IMDACS system.

Obrien, S. O.↗