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SIR-C Survey Data

EN Atlantic C

Data Take ID: dt079_10

CD-ROM ID: sirc_fl2_08

Date: Wednesday, October 05, 1994

A data take is a single continuous swath of data. Each data take survey strip image is divided into 100 km image segments numbered starting from 01. When displayed, each image segment is oriented such that the near range pixels are at the top of the image. For right-looking images, the spacecraft flight direction is from left to right. For left-looking images, the spacecraft flight direction is from right to left. The look direction and each image segment corner points are located in the DTHDR.TXT file.

DTHDR.TXT is an ASCII file that contains radar, image, and processing parameters of the corresponding data take. It also contains a table describing each image segment in terms of GMT, latitude, and longitude at image center.

QA.TXT is an ASCII file that contains Q/A parameters of the corresponding take.

DOPPLR.TXT is an ASCII file that contains Doppler centroid estimates of the corresponding data take.

ROLL.TXT (SIR-C data only) is an ASCII file that contains roll angle estimates of the corresponding data take.

SEG_nn.IMG contains the image data for image segment nn annotated with one second tick marks, center GMT, center latitude and longitude, and track angle. This file is a simple pixmap 2000 bytes wide by 946 lines high; there are no GIF, TIFF, etc. header records embedded in the image. Note that the SEG_nn.IMG file contains both image data and annotation. A sample image with annotation is available.

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