Packet comp_frame_pkt

MISE Compressed Frame packet structure

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Summary of Packet Fields

The packets of type comp_frame_pkt contain the following fields:

Name	DataType	BitLength	BitOffset	ByteOrder
Instrument SCLK Time secondTime tag, J2000 (seconds)	uint	32	0	big
Instrument SCLK Time subsecFractional time (1/216 seconds)	uint	16	32	big
Accountability IDAccountability ID	uint	32	48	big
Row OriginWindow origin, row	uint	9	80	big
Column OriginWindow origin, column	uint	9	89	big
Window RowsWindow dimensions, rows	uint	9	98	big
Window ColumnsWindow dimensions, columns	uint	9	107	big
Row BinningRow binning	uint	2	116	big
Column BinningColumn binning	uint	2	118	big
Comp DataCompressed pixel data. The first 14 bits are used for the P0,0 uncompressed value.then each pixel value is compressed on 4bits values are organized in strips of 320 pixels. Padding bits are added at the end of the compressed stream to align on bytes.	uint[]	8	120	big
PEC (CRC-16-CCITT)Packet Error Control field, using CRC-16-CCITT algorithm	uint	16	128	big

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Packet Field Details

Here follows the detailed description of the packet fields.

Instrument SCLK Time second

Time tag, J2000 (seconds)

DataType	uint
BitLength	32
BitOffset	0
ByteOrder	big

Instrument SCLK Time subsec

Fractional time (1/216 seconds)

DataType	uint
BitLength	16
BitOffset	32
ByteOrder	big

Accountability ID

Accountability ID

DataType	uint
BitLength	32
BitOffset	48
ByteOrder	big

Row Origin

Window origin, row

DataType	uint
BitLength	9
BitOffset	80
ByteOrder	big

Column Origin

Window origin, column

DataType	uint
BitLength	9
BitOffset	89
ByteOrder	big

Window Rows

Window dimensions, rows

DataType	uint
BitLength	9
BitOffset	98
ByteOrder	big

Window Columns

Window dimensions, columns

DataType	uint
BitLength	9
BitOffset	107
ByteOrder	big

Row Binning

Row binning

DataType	uint
BitLength	2
BitOffset	116
ByteOrder	big

Column Binning

Column binning

DataType	uint
BitLength	2
BitOffset	118
ByteOrder	big

Comp Data

Compressed pixel data. The first 14 bits are used for the P0,0 uncompressed value.then each pixel value is compressed on 4bits values are organized in strips of 320 pixels. Padding bits are added at the end of the compressed stream to align on bytes.

DataType	uint[]
BitLength	8
BitOffset	120
ByteOrder	big
ArrayShape	expand
ArrayOrder	C

PEC (CRC-16-CCITT)

Packet Error Control field, using CRC-16-CCITT algorithm

DataType	uint
BitLength	16
BitOffset	128
ByteOrder	big