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NOAA KLM User's GuideSection 8.3.1.9.3.3 |
Introduction Page, NOAA KLM TOC,
AcronymsThe MHS Level 1b Record Format (Extended Memory Data Packet) is documented in Table 8.3.1.9.3-3. See the legend in Section 8.3.1.1 for further explanation of the headings on this table.
| Field Name | Start Octet |
End Octet |
Data Type |
Word Size |
Number of Words |
Scale Factor |
Units | Notes |
|---|---|---|---|---|---|---|---|---|
| SCAN LINE INFORMATION | ||||||||
| Scan Line Number (cumulative, starting with 1) | 1 | 2 | u | 2 | 1 | 0 | ||
| Scan Line Year (four digits, e.g., 2000) | 3 | 4 | u | 2 | 1 | 0 | ||
| Scan Line Day of Year (e.g., 365) | 5 | 6 | u | 2 | 1 | 0 | ||
| Satellite Clock Drift Delta | 7 | 8 | i | 2 | 1 | 0 | milliseconds | |
| Scan Line UTC Time of Day | 9 | 12 | u | 4 | 1 | 0 | milliseconds | |
| Scan Line Bit Field bit 15: satellite direction (0=northbound; 1=southbound) bit 14: clock drift correction (0=not corrected; 1=scan time corrected for clock drift) bits 13-0: <zero fill> |
13 | 14 | u | 2 | 1 | 0 | ||
| Major Frame Count (cumulative, starting with 1) | 15 | 16 | u | 2 | 1 | 0 | ||
| Coarse MHS On-board Time (OBT) (time since last reset to zero) | 17 | 20 | u | 4 | 1 | 0 | seconds | |
| Fine MHS OBT (fraction of second since last increment of coarse
MHS OBT. Resolution: 2-16 seconds; range: 0 - 65,535.) |
21 | 22 | u | 2 | 1 | 0 | ||
| MHS Mode Flag 0=power-on ("empty" MHS science data) 1=warm-up ("empty" MHS science data) 2=Standby ("empty" MHS science data) 3=scan (valid MHS science data) 4=fixed view (valid MHS science data, but instrument is viewing a fixed location) 5=self test (test data) 6=safeing ("empty" MHS science data) 7=fault ("empty" MHS science data) 8-14=<undefined> (unknown data) 15=memory dump (memory dump data) |
23 | 23 | u | 1 | 1 | 0 | ||
| <Zero Fill> | 24 | 24 | i | 1 | 1 | 0 | ||
| QUALITY INDICATORS | ||||||||
| Quality Indicator Bit Field (if a bit is on (=1), the statement is true) bit 31: do not use scan for product generation bit 30: time sequence error detected within this scan (see below) bit 29: data gap precedes this scan (gap may be due to actual lost scans or scans in which the TIP or MIU are in non-nominal modes) bit 28: insufficient data for calibration (see below) bit 27: earth location data not available (see below) bit 26: first good time following a clock update (nominally 0) bit 25: instrument status changed with this scan bits 24 - 5: <zero fill> bit 4: transmitter status change occurred (see note 2) bit 3: AMSU sync error detected bit 2: AMSU minor frame error detected bit 1: AMSU major frame error detected bit 0: AMSU parity error detected |
25 | 28 | u | 4 | 1 | 0 | 2 | |
| Scan Line Quality Flags [Time Problem Code] (If a bit is on (=1),
the statement is true. All bits off implies the scan time is as
expected.) bit 7: time field is bad but can probably be inferred from the previous good time bit 6: time field is bad and can't be inferred from the previous good time bit 5: this record starts a sequence that is inconsistent with previous times (i.e., there is a time discontinuity). This may be associated with a spacecraft clock update. (See bit 26, Quality Indicator Bit Field.) bit 4: start of a sequence that apparently repeats scan times that have been previously accepted bits 3-0: <zero fill> |
29 | 29 | u | 1 | 1 | 0 | ||
| <Zero Fill> | 30 | 1480 | i | 1 | 1451 | 0 | ||
| EXTENDED MEMORY DATA PACKET | ||||||||
| Packet ID/PIE ID bits 7-4: packet ID (15=memory data packet) bit 3: PIE ID (0=PIE A; 1=PIE B) bits 2-0: unused (undefined) |
1481 | 1481 | u | 1 | 1 | 0 | ||
| Start Address (where, word 1 is the most significant byte of address and word 3 is the least significant byte) | 1482 | 1484 | u | 1 | 3 | 0 | 3 | |
| Data Words | 1485 | 2508 | u | 2 | 512 | 0 | 3 | |
| <Zero Fill> | 2509 | 2834 | i | 2 | 163 | 0 | ||
| DISCRETE TELEMETRY (Equivalent to digital B and analog housekeeping telemetry in other instruments.) |
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| Main Bus Select Status (indicate which main bus (A or B) is used by the MHS) 1 (0V) = A bus (relay closed) 0 (5V) = B bus (relay opened) |
2835 | 2835 | u | 1 | 1 | 0 | 1 | |
| MHS Survival Heater 1=on 0=off |
2836 | 2836 | u | 1 | 1 | 0 | 1 | |
| RF Converter Protect Disable 1=no 0=yes |
2837 | 2837 | u | 1 | 1 | 0 | 1 | |
| MHS Power A 1=on 0=off |
2838 | 2838 | u | 1 | 1 | 0 | 1 | |
| MHS Power B 1=on 0=off |
2839 | 2839 | u | 1 | 1 | 0 | 1 | |
| Main Converter Protect Disable 1=no 0=yes |
2840 | 2840 | u | 1 | 1 | 0 | 1 | |
| Survival Temperatures Word 1: Receiver temperature Word 2: Electronics equipment temperature Word 3: Scan mechanism temperature |
2841 | 2846 | u | 2 | 3 | 0 | counts | 1 |
| Transmitter Telemetry Word 1: STX-1 status Word 2: STX-2 status Word 3: STX-3 status Word 4: STX-4 status Word 5: STX-1 power Word 6: STX-2 power Word 7: STX-3 power Word 8: SARR-A power Word 9: SARR-B power |
2847 | 2864 | u | 2 | 9 | 0 | counts | 1 |
| Discrete Telemetry Update Flags (If bit =0, associated telemetry item is up-to-date. If bit=1,
associated telemetry item was not updated during most recent telemetry cycle - possibly due to lost frame.) bits 31-18: <zero fill> bit 17: SARR-B power bit 16: SARR-A power bit 15: STX-3 power bit 14: STX-2 power bit 13: STX-1 power bit 12: STX-4 status bit 11: STX-3 status bit 10: STX-2 status bit 9: STX-1 status bit 8: Scan mechanism temperature bit 7: Electronics equipment temperature bit 6: Receiver temperature bit 5: Main converter protect disable bit 4: MHS power B bit 3: MHS power A bit 2: RF converter protect disable bit 1: MHS survival heater bit 0: Main bus select status |
2865 | 2868 | u | 1 | 4 | 0 | 1 | |
| FILLER | ||||||||
| <Zero Fill> | 2869 | 3072 | i | 2 | 102 | 0 | ||
| NOTES: 1) The MHS Level 1b will not contain any MIU-related analog or digital B telemetry items from the NOAA data stream. These items will be archived in a separate NOAA telemetry file. 2) The RFI bias correction data is based on experience with the AMSU-B instrument from the NOAA KLM series of satellites. While it may not be necessary, it is being left in the MHS Level 1b format. Unitl a determination is made that it is necessary, it will be zero filled. 3) Refer to Section 4.3.2.2 of MHS TM-TC and Science Data Format Directory for a detailed description of the content of this field. |
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