LDI DIGISONDE 4D - Databins; Packet Group Header

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DIGISONDE-4D
SYSTEM MANUAL
VERSION 1.2.11
5-44 SECTION 5 - SYSTEM SOFTWARE – ANNEX A
Packet Group Header
Table 5A- 22: Packet Group Header, Length 6 (12 for Debugging)
Byte
Offset
Byte
Len
Mnemonic
Description
Units
Type
Range
0
4
TIME_OFFSET
Time Offset of Frequency sounding from meas-
urement start time (ST)
ms
INT32U
0 to 4,294,967,296 ms
or approx. 50 days
4
1
RESTR_FLAG
Restricted Frequency Flag (0 – not restricted, 1 –
restricted)
-
INT8U
0, 1
5
1
AS
Attenuation Selection
Notes:
1. It is value commanded to Rx gain control.
2. Attenuation selection does not include Con-
stant Gain (from Program)
-
INT8S
0 … 7
6
2
MAX
Absolute maximum value Re or Im data (satura-
tion)
12 bit – DPS4S
14 bit – DPS4D
-
INT16U
12 bit – 0… 2048, satu-
ration 2049
14 bit – 0 … 8196
saturation 8197
16 bit – 0 … 32536
saturation 32537
8
2
FREQ
4
Frequency
kHz
INT16U
100 to 30000 kHz
10
1
POL
5
Polarization (Ordinary – 0, Extraordinary – 1)
-
INT8U
0, 1
11
1
CODE
6
Complementary Code Number:
-1 - Code is undefined for this program
1 - Code 1
2 - Code 2
-
INT8S
-1, 1, 2
Databins
5:103. We consider three types of Databins, Raw Databin, Doppler Databin, and Ionogram Databin.
5:104. Raw Databin is one quadrature sample, so it is equivalent to pair of numbers, which constitute one
complex number and described in Table 5A- 23.
5:105. Doppler Databin is the piece of information that is used in Ionogram Data Structure and pertained to
specified frequency, polarization, height, antenna, and Doppler. Doppler Databin described in Table 5A- 24.
5:106. Ionogram Databin is the piece of information that is used in Ionogram Data Structure and pertains to
specified frequency, polarization and height. Ionogram Databin described in
4
This is temporary field. It is used only for debugging
5
See previous note
6
See previous note