LRIT Header Description

As described in File Header Processing, the LRIT File Header actually contains several header types with different sizes. All headers has at least three starting bytes that represent the type and size of header:

Field Type Description
Type uint8_t Type of header (see table below)
Size uint16_t Size of the entire header (include these fields)
Data ? (depends on type) Data of the header (depends on type)

Table 1 - Basic LRIT Header Structure

All the descriptions of headers will not include these two fields (type and size) since its common to all headers. The headers can be divided into two groups:

Type Name
1 Image Structured Header
2 Image Navigation Record
3 Image Data Function Record
4 Annotation Record
5 Timestamp Record
6 Ancillary Text
7 Key Header
128 Segment Identification Header
129 NOAA Specific Header
130 Header Structured Record
131 Rice Compression Record
132 DCS Filename Record

Table 2 - Secondary Header Types

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