LDI DIGISONDE 4D - Page 229

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DIGISONDE-4D
SYSTEM MANUAL
VERSION 1.2.11
5-32 SECTION 5 - SYSTEM SOFTWARE – ANNEX A
Table 5A- 5 shows specification of the Data Processing structure.
Table 5A- 5: Data Processing Structure (Length 2 Bytes)
Byte
Offset
Byte
Len
Mnemonic
Description
Units
Type
Range
0
1
CHAINED_PRO
C
Chained process step to be applied:
0 = Do not process (raw data)
1 = Pulse compression
2 = Sum complimentary
3 = Doppler calculation
4 = Ionogram calculation
Note: temporarily constant, set to Do not process
-
INT8U
0 … 4
1
1
UNCHAINED_P
ROC
Bit-mask for unchained process steps to be applied.
0x1 = Channel EQ
0x2 = RFI mitigation
-
INT8U
0 .. 3
Table 5A- 6 contains description of the Sounding Program. The Common Specification section of the sound-
ing program definition is highlighted in blue. Parameters that are ignored by DESC are highlighted in yellow.
Table 5A- 7 describes contents of the Flexible Frequency List (“flex-list”), which is used for specification of
varying number of arbitrary operating frequencies for the sounding operation.
Table 5A- 6: Sounding Operation Version 3 (Variable Length)
Byte
Offset
Byte
Len
Mnemonic
Description
Units
Type
Range
0
1
OP_CODE
Operation code. Contains constant 1 (Sounding).
INT8U
1
1
1
OP_OPTION
Operation option:
0 = Measurement
1 = Internal loopback
2 = HW (digitizer card hardware) test pattern
3 = SW (software) test pattern
-
INT8U
-
2
2
ALL_PROC
All data processing steps desired to be applied to raw
data
-
Data Pro-
cessing
structure
N/A
4
2
DESC_PROC
Processing desired to be done prior to delivery of data to
DCART. This Data Processing is equal to some incom-
plete part of ALL_PROC or to the whole ALL_PROC.
Notes:
Although DCART can run all processing steps described by
ALL_PROC, these steps can be delegated, partially or com-
pletely, to the Digisonde
®
hardware and the embedded com-
puter system, thus relieving DCART from some of the work
to be done. It is possible to control where particular pro-
cessing steps occur by specifying DESC_PROC.
Data Processing that has really been applied by DESC is
reflected in corresponding field of Data Preface structure
and it should not exceed Data Processing described by this
field.
Data Pro-
cessing
structure
N/A
6
bits:
0-3
FILE_FORMAT
File format that will be used for final product data file after
applying all processing steps defined by ALL_PROC. The
following file data format options are available:
0 – Generic Format. This format exists for any kind of data
as Raw Data, Doppler Data, Ionogram Data
1 – DFT format. Only for Doppler Data
2 – RSF format. Only for Ionogram Data
Note: this field is ignored by DESC
-
INT4U
0, 1, 2