PDS_VERSION_ID = PDS3
RECORD_TYPE = FIXED_LENGTH
RECORD_BYTES = 80
OBJECT = TEXT
PUBLICATION_DATE = 1999-08-12
NOTE = "DSN Software Interface Specification for Medium
Band POCA Data ODR Tape. Converted to digital
format with minor editorial changes 1999-08-12.
Original date unknown, but probably 1980-era.
Handwritten notes on hard copy suggest definitions
for Words 1-3 may be suspect and that Time of Day
in Words 29-30 is in UT."
END_OBJECT = TEXT
END
820-13, RSC-11-5
MEDIUM-BAND POCA DATA ODR TAPE
WORD 1
Tape Number:
Bits 9 through 16. Binary integer.
Unused Bits.:
Bits 1 through 8. Undefined
WORD 2
Record Number:
Binary integer (16-bit).
WORD 3
Record Length:
Binary integer (16-bit). Number of words in the record. Set to 228
WORD 4
Spacecraft Number:
Bits 1 through S. Binary representation of spacecraft number (refer
to 820-13, module OPS 6-6).
Source Station:
Bits 9 through 16. Binary representation of DSS station number.
WORD 5,6
Predict Set ID:
Four ASCII characters.
WORD 7
Unused. Undefined
-------------------------820-13,RSC-11-5-------------------------
------------------------------1 of 4-----------------------------
WORDS 8,9
Predict Base Frequency:
32-bit integer Hz. LSB is bit 16 of word 9.
WORDS 10 through 28
Unused. Undefined
WORDS 29,30
Day of Year
Bits 1 through 9 of word 29. Binary integer number.
Time of Day
A 17-bit binary number representing the number of seconds since the
start of the day. MSB is word 29, bit 16; LSB is word 30, bit 16.
Unused Bits
Word 29, bits 10 through 15. Undefined
WORDS 31,32,33
POCA Frequency (displaced)
The contents of the POCA frequency registers, less the predict base
frequency (see words 8-9). Formatted as a 48-bit binary number with
the LSB= 2 20 Hz (bit 16 of word 33). Value may be positive or
negative (2's complement format).
WORDS 34,35,36
POCA Ramp Rate
The POCA ramp rate in Hertz/second. Formatted as a 48-bit binary
number, with the LSB (word 36, bit 16) equal to 2-20 Hz/second.
WORD 37
Frequency-Monitor Subassembly (FMS) Status
Bit 1: 0= FMS ON, 1= OFF
Bits 3,4: Test signal selection 01= Input #1 (POCA)
10= Input #2
11= Internal Signal
00= Spare (not used)
-------------------------820-13,RSC-11-5-------------------------
------------------------------2 of 4-----------------------------
WORD 37 (cont.)
Bit 7: Counter #1 signal selection
1= Input #1 (POCA), 0= Test signal
Bit 8: Counter #2 signal selection
1= Input #2, 0= Test signal
Programmed Oscillator Control Assy (POCA) Status
Bit 9: 1= Manual Control, O= Computer Control*
Bit 10: 1= Ready*, 0= Not Ready
Bit 11: 1= Synth. Power On*, 0= Off
Bit 12: 1= Synth. In Lock*, 0= Out-of lock
Bit 13: 1= Limit Enable On, O= Off*
Bit 14: 1= Track On*, O= Off
Bit 15: 1= Acquisition On, 0= Off*
Bit 16: 1= Sweep On*, 0= Off
* Indicates normal state for Radio Science.
Unused Bits:
Bits 2,5,6. Undefined.
WORDS 38,39,40
Frequency Monitor #1 Data.
Cumulative phase in cycles. Formatted as a 48-bit binary number,
with the LSB (word 40, bit 16) equal to 2^-8 cycles.
WORDS 41,42,43
Frequency Monitor #2 Data.
Cumulative phase in cycles. Formatted as a 48-bit binary number, with
the LSB (word 43, bit 16) equal to 2^-8 cycles.
WORDS 44,45,46
Predict Frequency (displaced)
The actual predict frequency, less the predict base frequency (see
words 8-9). Formatted as a 48-bit binary number, with the LSB
(bit 16 of word 46) equal to 2^-20 Hz. Value may be positive or
negative (2's complement format).
WORDS 47,48
Unused. Undefined
-------------------------820-13,RSC-11-5-------------------------
------------------------------3 of 4-----------------------------
WORDS 49 through 68
Same format as words 29 through 48, for second n + 1.
WORDS 69 through 88
Same format as words 29 through 48, for second n + 2.
WORDS 89 through 108
Same format as words 29 through 48, for second n + 3.
WORDS 109 through _128
Same format as words 29 through 48, for second n + 4.
WORDS 129 through 148
Same format as words 29 through 48, for second n + 5.
WORDS 149 through 168
Same format as words 29 through 48, for second n + 6.
WORDS 169 through 188
Same format as words 29 through 48, for second n + 7.
WORDS 189 through 208
Same format as words 29 through 48, for second n + 8.
WORDS 209 through 228
Same format as words 29 through 48 for second n + 9.
-------------------------820-13,RSC-11-5-------------------------
------------------------------4 of 4-----------------------------
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