McIDAS Programmer's Manual
Version 2003

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TIP data

TIP (TIROS-N Information Processor) data is extracted from the AVHRR, GAC and LAC data described in the previous section. TIP data also contains information received from the MSU (Microwave Sounding Unit), the HIRS (High Resolution Infrared Sounder), and the SSU (Stratospheric Sounding Unit). These three sources measure incoming radiation in the infrared and microwave spectrum.

The navigation block for TIP data is filled with zeros; no calibration information is needed.

TIP directory block

Word Value Description

14

1

 

19

1

band map value

49

196

length of the line prefix documentation

50

0

length of the line prefix calibration

51

0

line prefix band list

52

TIRO

image source type; 4 bytes ASCII

53

RAW

calibration type; 4 bytes ASCII

TIP data block

TIP data is transmitted as 10 bits and stored as 16 bits. The 10-bit data is formatted as follows, with x representing a data bit and the rest being zero-filled after shifting:

| 0 | x | x | x | x | x | x | x | x | x | x | 0 | 0 | 0 | 0 | 0 |

The line prefix for the data block contains the information below.

Region Description

validity code

optional, but recommended to flag missing data, which requires zeros as placeholder data or a validity code that does not match the value in the area directory

documentation

196-byte DOC section from the signal transmission

calibration

0 bytes; not needed for TIP data

band list

0 bytes; not needed for TIP data

 

 

For a complete description of the line documentation fields, see NOAA Technical Memorandum NESS 107, 1988. The band information for TIP data is provided in this manual in Appendix B, Satellite Information.


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