NOAA KLM User's Guide

Section 8.3.1.6.3.1
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8.3.1.6.3.1 NOAA KLM Format (Version 2, pre-April 28, 2005)

The AMSU-A Data Record format is documented in Table 8.3.1.6.3.1-1. See the legend in Section 8.3.1.1 for further explanation of the headings on this table.

Table 8.3.1.6.3.1-1. Format of AMSU-A Data Record (Version 2, pre-April 28, 2005).
Field Name Start Octet End Octet Data Type Word Size Number of Words Scale Factor Units Notes
Scan Line Number (cumulative, starting with 1) 1 2 u 2 1 0    
Scan Line Year (e.g., 1999) 3 4 u 2 1 0 year  
Scan Line Day of Year (e.g., 365) 5 6 u 2 1 0 day  
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: 0 = northbound data; 1 = southbound data
bit 14: 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    
<Zero Fill> 17 24 i 4 2 0    
QUALITY INDICATORS
Quality Indicator Bit Field
If a bit is on (=1) then 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
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 - 4: <zero fill>
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    
Scan Line Quality Flags
If a bits is on (=1) then the statement is true.
Time Problem Code
(All bits off implies the scan time is as expected.)
bits 31 - 24: <zero fill>
bit 23: time field is bad but can probably be inferred from the previous good time.
bit 22: time field is bad and can't be inferred from the previous good time.
bit 21: this record starts a sequence that is inconsistent with previous times (i.e., there is a time discontinuity). This may or may not be associated with a spacecraft clock update. (See bit 26, Quality Indicator Bit Field)
bit 20: start of a sequence that apparently repeats scan times that have been previously accepted.
bit 19 - 16: <zero fill>
Calibration Problem Code
(Note these bits complement the channel indicators; all bits set to 0 indicates normal calibration.)
bit 15: Scan line was not calibrated because of bad time.
bit 14: Scan line was calibrated using fewer than the preferred number of scan lines because of proximity to start or end of data set or to a data gap.
bit 13: Scan line was not calibrated because of bad or insufficient PRT data.
bit 12: Scan line was calibrated but with marginal PRT data.
bit 11: Some uncalibrated channels on this scan. (See channel indicators.)
bit 10: Uncalibrated due to instrument mode.
bit 9: Questionable calibration because of antenna position error of space view.
bit 8: Questionable calibration because of antenna position error of blackbody.
Earth Location Problem Code
(all bits set to 0 implies the earth location was normal)
bit 7: Not earth located because of bad time; earth location fields zero filled.
bit 6: Earth location questionable because of questionable time code. (See time problem flags above.)
bit 5: Earth location questionable -- only marginal agreement with reasonableness check.
bit 4: Earth location questionable -- fails reasonableness check.
bit 3: Earth location questionable because of antenna position check [rs060794.doc & rs062094.do1]
bits 2-0: <zero fill>		 29 32 u 4 1 0    
Calibration Quality Flags
Word 1: Channel 1
(all bits off implies a good calibration)
bits 15 - 6: <zero fill>
bit 5: All bad blackbody counts for scan line
bit 4: All bad space view counts for scan line
bit 3: All bad PRTs for this line
bit 2: Marginal blackbody view counts for this line
bit 1: Marginal space view counts for this line
bit 0: Marginal PRT temps on this line
Words 2 - 15: Channels 2 through 15, in order
Word 16: <zero fill>		 33 64 u 2 16 0    
<Zero Fill> 65 80 i 4 4 0    
CALIBRATION COEFFICIENTS
Note: The following coefficients are only available in Full Scan mode, otherwise the coefficient fields are <Zero Fill>. Refer to Digital A Telemetry, Digital Housekeeping Word 1 for the current mode.
Primary Calibration Ch 1 Second Order Term, a2 81 84 i 4 1 19    
Primary Calibration Ch 1 First Order Term, a1 85 88 i 4 1 13    
Primary Calibration Ch 1 Zeroth Order Term, a0 89 92 i 4 1 9    
Primary Calibration Ch 2 Second Order Term, a2 93 96 i 4 1 19    
Primary Calibration Ch 2 First Order Term, a1 97 100 i 4 1 13    
Primary Calibration Ch 2 Zeroth Order Term, a0 101 104 i 4 1 9    
Primary Calibration Ch 3 Second Order Term, a2 105 108 i 4 1 19    
Primary Calibration Ch 3 First Order Term, a1 109 112 i 4 1 13    
Primary Calibration Ch 3 Zeroth Order Term, a0 113 116 i 4 1 9    
Primary Calibration Ch 4 Second Order Term, a2 117 120 i 4 1 19    
Primary Calibration Ch 4 First Order Term, a1 121 124 i 4 1 13    
Primary Calibration Ch 4 Zeroth Order Term, a0 125 128 i 4 1 9    
Primary Calibration Ch 5 Second Order Term, a2 129 132 i 4 1 19    
Primary Calibration Ch 5 First Order Term, a1 133 136 i 4 1 13    
Primary Calibration Ch 5 Zeroth Order Term, a0 137 140 i 4 1 9    
Primary Calibration Ch 6 Second Order Term, a2 141 144 i 4 1 19    
Primary Calibration Ch 6 First Order Term, a1 145 148 i 4 1 13    
Primary Calibration Ch 6 Zeroth Order Term, a0 149 152 i 4 1 9    
Primary Calibration Ch 7 Second Order Term, a2 153 156 i 4 1 19    
Primary Calibration Ch 7 First Order Term, a1 157 160 i 4 1 13    
Primary Calibration Ch 7 Zeroth Order Term, a0 161 164 i 4 1 9    
Primary Calibration Ch 8 Second Order Term, a2 165 168 i 4 1 19    
Primary Calibration Ch 8 First Order Term, a1 169 172 i 4 1 13    
Primary Calibration Ch 8 Zeroth Order Term, a0 173 176 i 4 1 9    
Primary Calibration Ch 9 Second Order Term, a2 177 180 i 4 1 19    
Primary Calibration Ch 9 First Order Term, a1 181 184 i 4 1 13    
Primary Calibration Ch 9 Zeroth Order Term, a0 185 188 i 4 1 9    
Primary Calibration Ch 10 Second Order Term, a2 189 192 i 4 1 19    
Primary Calibration Ch 10 First Order Term, a1 193 196 i 4 1 13    
Primary Calibration Ch 10 Zeroth Order Term, a0 197 200 i 4 1 9    
Primary Calibration Ch 11 Second Order Term, a2 201 204 i 4 1 19    
Primary Calibration Ch 11 First Order Term, a1 205 208 i 4 1 13    
Primary Calibration Ch 11 Zeroth Order Term, a0 209 212 i 4 1 9    
Primary Calibration Ch 12 Second Order Term, a2 213 216 i 4 1 18    
Primary Calibration Ch 12 First Order Term, a1 217 220 i 4 1 13    
Primary Calibration Ch 12 Zeroth Order Term, a0 221 224 i 4 1 9    
Primary Calibration Ch 13 Second Order Term, a2 225 228 i 4 1 19    
Primary Calibration Ch 13 First Order Term, a1 229 232 i 4 1 13    
Primary Calibration Ch 13 Zeroth Order Term, a0 233 236 i 4 1 9    
Primary Calibration Ch 14 Second Order Term, a2 237 240 i 4 1 19    
Primary Calibration Ch 14 First Order Term, a1 241 244 i 4 1 13    
Primary Calibration Ch 14 Zeroth Order Term, a0 245 248 i 4 1 9    
Primary Calibration Ch 15 Second Order Term, a2 249 252 i 4 1 19    
Primary Calibration Ch 15 First Order Term, a1 253 256 i 4 1 13    
Primary Calibration Ch 15 Zeroth Order Term, a0 257 260 i 4 1 9    
Secondary Calibration Ch 1 Second Order Term, a2 261 264 i 4 1 19    
Secondary Calibration Ch 1 First Order Term, a1 265 268 i 4 1 13    
Secondary Calibration Ch 1 Zeroth Order Term, a0 269 272 i 4 1 9    
Secondary Calibration Ch 2 Second Order Term, a2 273 276 i 4 1 19    
Secondary Calibration Ch 2 First Order Term, a1 277 280 i 4 1 13    
Secondary Calibration Ch 2 Zeroth Order Term, a0 281 284 i 4 1 9    
Secondary Calibration Ch 3 Second Order Term, a2 285 288 i 4 1 19    
Secondary Calibration Ch 3 First Order Term, a1 289 292 i 4 1 13    
Secondary Calibration Ch 3 Zeroth Order Term, a0 293 296 i 4 1 9    
Secondary Calibration Ch 4 Second Order Term, a2 297 300 i 4 1 19    
Secondary Calibration Ch 4 First Order Term, a1 301 304 i 4 1 13    
Secondary Calibration Ch 4 Zeroth Order Term, a0 305 308 i 4 1 9    
Secondary Calibration Ch 5 Second Order Term, a2 309 312 i 4 1 19    
Secondary Calibration Ch 5 First Order Term, a1 313 316 i 4 1 13    
Secondary Calibration Ch 5 Zeroth Order Term, a0 317 320 i 4 1 9    
Secondary Calibration Ch 6 Second Order Term, a2 321 324 i 4 1 19    
Secondary Calibration Ch 6 First Order Term, a1 325 328 i 4 1 13    
Secondary Calibration Ch 6 Zeroth Order Term, a0 329 332 i 4 1 9    
Secondary Calibration Ch 7 Second Order Term, a2 333 336 i 4 1 19    
Secondary Calibration Ch 7 First Order Term, a1 337 340 i 4 1 13    
Secondary Calibration Ch 7 Zeroth Order Term, a0 341 344 i 4 1 9    
Secondary Calibration Ch 8 Second Order Term, a2 345 348 i 4 1 19    
Secondary Calibration Ch 8 First Order Term, a1 349 352 i 4 1 13    
Secondary Calibration Ch 8 Zeroth Order Term, a0 353 356 i 4 1 9    
Secondary Calibration Ch 9 Second Order Term, a2 357 360 i 4 1 19    
Secondary Calibration Ch 9 First Order Term, a1 361 364 i 4 1 13    
Secondary Calibration Ch 9 Zeroth Order Term, a0 365 368 i 4 1 9    
Secondary Calibration Ch 10 Second Order Term, a2 369 372 i 4 1 19    
Secondary Calibration Ch 10 First Order Term, a1 373 376 i 4 1 13    
Secondary Calibration Ch 10 Zeroth Order Term, a0 377 380 i 4 1 9    
Secondary Calibration Ch 11 Second Order Term, a2 381 384 i 4 1 19    
Secondary Calibration Ch 11 First Order Term, a1 385 388 i 4 1 13    
Secondary Calibration Ch 11 Zeroth Order Term, a0 389 392 i 4 1 9    
Secondary Calibration Ch 12 Second Order Term, a2 393 396 i 4 1 19    
Secondary Calibration Ch 12 First Order Term, a1 397 400 i 4 1 13    
Secondary Calibration Ch 12 Zeroth Order Term, a0 401 404 i 4 1 9    
Secondary Calibration Ch 13 Second Order Term, a2 405 408 i 4 1 19    
Secondary Calibration Ch 13 First Order Term, a1 409 412 i 4 1 13    
Secondary Calibration Ch 13 Zeroth Order Term, a0 413 416 i 4 1 9    
Secondary Calibration Ch 14 Second Order Term, a2 417 420 i 4 1 19    
Secondary Calibration Ch 14 First Order Term, a1 421 424 i 4 1 13    
Secondary Calibration Ch 14 Zeroth Order Term, a0 425 428 i 4 1 9    
Secondary Calibration Ch 15 Second Order Term, a2 429 432 i 4 1 19    
Secondary Calibration Ch 15 First Order Term, a1 433 436 i 4 1 13    
Secondary Calibration Ch 15 Zeroth Order Term, a0 437 440 i 4 1 9    
<Zero Fill> 441 456 i 4 4 0    
NAVIGATION
Navigation Status Bit Field
bits 31-17: <zero fill>
bit 16: 1 = earth location for this scan corrected for TIP Euler angles
bits 15 - 12: earth location indicator (0 = earth location available; 1 = user ephemeris files greater than 24 hours old; 2 = no earth location available)
bits 11 - 8: spacecraft attitude control (0 = operating in YGC or NOMINAL mode; 1 = operating in another mode; 2 = attitude exceeds nominal tolerance; 3 = both 1 and 2)
bits 7 - 4: attitude SMODE (0 = NOMINAL mode; 1 = rate nulling mode; 2 = YGC mode; 3 = search mode; 4 = coast mode)
bits 3 - 0: attitude PWTIP$AC (0 = NOMINAL mode/no test; 1 = yaw axis test in progress; 2 = roll axis test in progress; 3 = pitch axis test in progress)		 457 460 u 4 1 0    
Time Associated with TIP Euler Angles 461 464 u 4 1 0 seconds  
TIP Euler Angles
Word 1: Roll
Word 2: Pitch
Word 3: Yaw		 465 470 i 2 3 3 degrees  
Spacecraft Altitude above Reference Ellipsoid 471 472 u 2 1 1 kilometers  
Angular Relationships
(local azimuth range +/- 180.00)
Word 1: Solar Zenith Angle, Position 1
Word 2: Satellite Zenith Angle, Position 1
Word 3: Local Azimuth Angle, Position 1
Word 4: Solar Zenith Angle, Position 2
...
(set of 3 angles for every position)
...
Word 90: Local Azimuth Angle, Position 30		 473 652 i 2 90 2 degrees  
Earth Location
(North latitude and East longitude are positive)
Word 1: Latitude, Position 1
Word 2: Longitude, Position 1
Word 3: Latitude, Position 2
...
(lat/lon word pair for every position)
...
Word 60: Longitude, Position 30		 653 892 i 4 60 4 degrees  
<Zero Fill> 893 896 i 4 1 0    
AMSU-A1 DIGITAL A TELEMETRY
Synchronization Sequence (hex FF) 897 899 u 1 3 0    
Unit Identification and Serial Number
1 = Engineering Model Module A-1
5 = Protoflight Model Module A-1
9 = Flight Model 1 Module A-1
13 = Flight Model 2 Module A-1		 900 900 u 1 1 0    
Digital Housekeeping
Word 1: Data 1
bit 7: <zero fill>
bit 6: cold cal position msb
bit 5: cold cal position lsb
(cold cal position: 0 = 6.667 deg from -Z; 1 = 8.333 deg; 2 = 9.999 deg; 3 = 13.332 deg)
bit 4: nadir mode (0 = not in nadir; 1 = nadir)
bit 3: cold cal mode (0 = not in cold cal; 1 = cold cal)
bit 2: warm cal mode (0 = not in warm cal; 1 = warm cal)
bit 1: full scan mode (0 = not full scan; 1 = full scan)
bit 0: <zero fill>
Word 2: Data 2
bits 7-5: <zero fill>
bit 4: survival heater power (0 = off; 1 = on)
bit 3: PLL power (0 = redundant; 1 = primary)
bit 2: scanner A1-2 power (0 = off; 1 = on)
bit 1: scanner A1-1 power (0 = off; 1 = on)
bit 0: <zero fill>
Word 3: Data 3
bits 7-0: <zero fill>
Word 4: Data 4
bits 7-0: <zero fill>		 901 904 u 1 4 0    
Scene Telemetry
Scanner is parked at warm cal position while in warm cal mode, cold cal position while in cold cal mode, and nadir position while in nadir mode (see Digital Housekeeping Word 1, above). In parked modes, words 1 through 17 are repeated 29 times for a total of 30 data sets at the designated scanner position. In full scan mode, the scanner is stepped from positions 1 to 30 as indicated.
Word 1: Reflector A1-1, position 1, first reading
Word 2: Reflector A1-2, position 1, first reading
Word 3: Reflector A1-1, position 1, second reading
Word 4: Reflector A1-2, position 1, second reading
Words 5 - 17: Scene count at position 1, channels 3 through 15 (in order)
Word 18: Reflector A1-1, position 2, first reading
...
(seventeen words for every position)
...
Words 498 - 510: Scene count at position 30, channels 3 through 15 (in order)		 905 1924 u 2 510 0    
Cold Calibration Telemetry
These words are zero-filled in warm cal, cold cal, and nadir modes. In full scan mode, these words contain the following data:
Word 1: Reflector A1-1, cold calibration position, first reading
Word 2: Reflector A1-2, cold calibration position, first reading
Word 3: Reflector A1-1, cold calibration position, second reading
Word 4: Reflector A1-2, cold calibration position, second reading
Words 5 - 17: Cold cal count 1, channels 3 through 15 (in order)
Words 18 - 30: Cold cal count 2, channels 3 through 15 (in order)		 1925 1984 u 2 30 0 counts  
Temperature Sensor Telemetry
(in counts, all modes)
Word 1: scan motor A1-1
Word 2: scan motor A1-2
Word 3: feed horn A1-1
Word 4: feed horn A1-2
Word 5: RF mux A1-1
Word 6: RF mux A1-2
Words 7 - 12: local oscillator channels 3 through 8
Word 13: local oscillator channel 15
Word 14: PLLO #2 Channels 9 through 14
Word 15: PLLO #1 Channels 9 through 14
Word 16: PLLO (reference oscillator)
Words 17 - 22: Mixer/IF amplifier channels 3 through 8
Word 23: Mixer/IF amplifier channel 9/14
Word 24: Mixer/IF amplifier channel 15
Word 25: IF amplifier channel 11/14
Words 26 - 28: IF amplifier channels 9, 10, and 11 (in order)
Word 29: DC/DC converter
Words 30 - 31: IF amplifier channels 13 and 14 (in order)
Word 32: IF amplifier channel 12
Word 33: RF shelf A1-1
Word 34: RF shelf A1-2
Word 35: Detector/Preamp Assembly
Words 36 - 39: A1-1 warm load 1 through 4
Word 40: A1-1 warm load center
Words 41 - 44: A1-2 warm load 1 through 4
Word 45: A1-2 warm load center
Word 46: reference voltage		 1985 2076 u 2 46 0 counts  
Warm Calibration Telemetry
These words are zero-filled in warm cal, cold cal, and nadir modes. In full scan mode, these words contain the following data:
Word 1: Reflector A1-1, warm calibration position, first reading
Word 2: Reflector A1-2, warm calibration position, first reading
Word 3: Reflector A1-1, warm calibration position, second reading
Word 4: Reflector A1-2, warm calibration position, second reading
Words 5 - 17: Warm cal count 1, channels 3 through 15 (in order)
Words 18 - 30: Warm cal count 2, channels 3 through 15 (in order)		 2077 2136 u 2 30 0 counts  
<Zero Fill> 2137 2140 i 4 1 0    
AMSU-A1 DIGITAL B TELEMETRY
Invalid Word Bit Flags
(if bit = 1, associated telemetry word was not updated during most recent minor frame cycle - possibly due to lost frame)
bit 15: <zero fill>
bit 14: cold cal position, msb
bit 13: cold cal position, lsb
bit 12: antenna in nadir position
bit 11: antenna in cold cal position
bit 10: antenna in warm cal position
bit 9: full scan mode
bits 8 - 6: <zero fill>
bit 5: module power
bit 4: survival heater
bit 3: Phase Lock Loop
bit 2: scanner A1-2 power
bit 1: scanner A1-1 power
bit 0: <zero fill>		 2141 2142 u 2 1 0    
Digital "B" Telemetry for AMSU-A1
(The instrument is operating with the antenna in warm cal position if bits 9, 10, 11, and 12 are all set to 0 OR bit 10 is set to 1. For cold cal position bits 13 and 14: 0 = 6.667; 1 = 8.333; 2 = 9.999; 3 = 13.332 degrees from -Z.)
bit 15: <zero fill>
bit 14: cold cal position, msb
bit 13: cold cal position, lsb
bit 12: antenna in nadir position (0 = no; 1 = yes)
bit 11: antenna in cold cal position (0 = no; 1 = yes)
bit 10: antenna in warm cal position (0 = no, unless bits 9, 11, and 12 also 0; 1 = yes)
bit 9: full scan mode (0 = no; 1 = yes)
bits 8 - 6: <zero fill>
bit 5: module power (0 = disconnect; 1 = connect)
bit 4: survival heater (0 = off; 1 = on)
bit 3: Phase Lock Loop (0 = redundant; 1 = primary)
bit 2: scanner A1-2 power (0 = off; 1 = on)
bit 1: scanner A1-1 power (0 = off; 1 = on)
bit 0: <zero fill>		 2143 2144 u 2 1 0    
<Zero Fill> 2145 2148 i 4 1 0    
AMSU-A1 ANALOG HOUSEKEEPING DATA (TIP)
Invalid Word Bit Flags
(if bit = 1, associated telemetry word was not updated during most recent minor frame cycle - possibly due to lost frame)
bits 31-28: <zero fill>
bit 27: Word 27
...
bit 1: Word 1
bit 0: <zero fill>		 2149 2152 u 4 1 0    
Word 1: A1-1 Scanner Motor Temperature
Word 2: A1-2 Scanner Motor Temperature
Word 3: RF Shelf A1-1 Temperature
Word 4: RF Shelf A1-2 Temperature
Word 5: Warm Load A1-1 Temperature
Word 6: Warm Load A1-2 Temperature
Word 7: Antenna A1-1 Drive Motor Current (Avg)
Word 8: Antenna A1-2 Drive Motor Current (Avg)
Word 9: +15 VDC (Signal Processing)
Word 10: +15 VDC (Antenna Drive)
Word 11: -15 VDC (Signal Processing)
Word 12: -15 VDC (Antenna Drive)
Word 13: +8 VDC (Receiver Amplifiers)
Word 14: +5 VDC (Signal Processing)
Word 15: +5 VDC (Antenna Drive)
Word 16: +8.5 VDC Phase Lock Loop Ch. 9/14
Word 17: +15 VDC Phase Lock Loop Ch. 9/14
Word 18: -15 VDC Phase Lock Loop Ch. 9/14
Word 19: GDO Voltage 50.3 GHz Ch. 3
Word 20: GDO Voltage 52.8 GHz Ch. 4
Word 21: GDO Voltage 53.596 GHz Ch. 5
Word 22: GDO Voltage 54.4 GHz Ch. 6
Word 23: GDO Voltage 54.94 GHz Ch. 7
Word 24: GDO Voltage 55.5 GHz Ch. 8
Word 25: PLLO Primary Lock Detect
Word 26: PLLO Redundant Lock Detect
Word 27: GDO Voltage 89.0 GHz Ch. 15
Word 28: <Zero Fill>		 2153 2180 u 1 28 0    
<Zero Fill> 2181 2184 i 4 1 0    
AMSU-A2 DIGITAL A TELEMETRY
Synchronization Sequence (hex FF) 2185 2187 u 1 3 0    
Unit Identification and Serial Number
2 = Engineering Model Module A-2
6 = Protoflight Model Module A-2
10 = Flight Model 1 Module A-2
14 = Flight Model 2 Module A-2		 2188 2188 u 1 1 0    
Digital Housekeeping
Word 1: Data 1
bit 7: <zero fill>
bit 6: cold cal position msb
bit 5: cold cal position lsb
bit 4: nadir mode (0 = not in nadir; 1 = nadir)
bit 3: cold cal mode (0 = not in cold cal; 1 = cold cal)
bit 2: warm cal mode (0 = not in warm cal; 1 = warm cal)
bit 1: full scan mode (0 = not full scan; 1 = full scan)
bit 0: <zero fill>
Word 2: Data 2
bits 7-5: <zero fill>
bit 4: survival heater power (0 = off; 1 = on)
bit 3: <zero fill>
bit 2: scanner compensator power (0 = off; 1 = on)
bit 1: scanner A2 power (0 = off; 1 = on)
bit 0: <zero fill>
Word 3: Data 3
bits 7-0: <zero fill>
Word 4: Data 4
bits 7-0: <zero fill>		 2189 2192 u 1 4 0    
Scene Telemetry
Scanner is parked at warm cal position while in warm cal mode, cold cal position while in cold cal mode, and nadir position while in nadir mode (see Digital Housekeeping Word 1, above). In parked modes, words 1 through 4 are repeated 29 times for a total of 30 data sets at the designated scanner position. In full scan mode, the scanner is stepped from positions 1 to 30 as indicated.
Word 1: Reflector, position 1, first reading
Word 2: Reflector, position 1, second reading
Words 3 - 4: Scene count at position 1, Channels 1 and 2 (in order)
Word 5: Reflector, position 2, first reading
...
(set of four words for every position)
...
Word 120: Scene count at position 30, Channel 2		 2193 2432 u 2 120 0    
Cold Calibration Telemetry
These words are zero-filled in warm cal, cold cal, and nadir modes. In full scan mode, these words contain the following data:
Word 1: Reflector, cold calibration position, first reading
Word 2: Reflector, cold calibration position, second reading
Words 3 - 4: Cold cal count 1, channels 1 and 2
Words 5 - 6: Cold cal count 2, channels 1 and 2		 2433 2444 u 2 6 0 counts  
Temperature Sensor Telemetry
(in counts, all modes)
Word 1: scan motor
Word 2: feed horn
Word 3: RF mux
Words 4 - 5: Mixer/IF amplifier channels 1 and 2
Words 6 - 7: local oscillator channels 1 and 2
Word 8: compensation motor
Word 9: subreflector
Word 10: DC/DC converter
Word 11: RF shelf A2
Word 12: Detector/Preamp Assembly
Word 13: Warm load center
Words 14 - 19: Warm load 1 through 6 (in order)
Word 20: Reference voltage		 2445 2484 u 2 20 0 counts  
Warm Calibration Telemetry
These words are zero-filled in warm cal, cold cal, and nadir modes. In full scan mode, these words contain the following data:
Word 1: Reflector, warm calibration position, first reading
Word 2: Reflector, warm calibration position, second reading
Words 3 - 4: Warm calibration 1, channels 1 and 2
Words 5 - 6: Warm calibration 2, channels 1 and 2		 2485 2496 u 2 6 0 counts  
<Zero Fill> 2497 2500 i 4 1 0    
AMSU-A2 DIGITAL B TELEMETRY
Invalid Data Bit Flags
(if bit = 1, associated telemetry word was not updated during most recent minor frame cycle - possibly due to lost frame)
bit 15: <zero fill>
bit 14: cold cal position, msb
bit 13: cold cal position, lsb
bit 12: antenna in nadir position
bit 11: antenna in cold cal position
bit 10: antenna in warm cal position
bit 9: full scan mode
bits 5 - 8: <zero fill>
bit 4: survival heater
bit 3: module power
bit 2: compensator motor
bit 1: scanner A2 power
bit 0: <zero fill>		 2501 2502 u 2 1 0    
Digital "B" Telemetry for AMSU-A2
(The instrument is operating with the antenna in warm cal position if bits 9, 10, 11, and 12 are all set to 0 OR bit 10 is set to 1. For cold cal position bits 13 and 14: 0 = 6.667; 1 = 8.333; 2 = 9.999; 3 = 13.332 degrees from -Z.)
bit 15: <zero fill>
bit 14: cold cal position, msb
bit 13: cold cal position, lsb
bit 12: antenna in nadir position (0 = no; 1 = yes)
bit 11: antenna in cold cal position (0 = no; 1 = yes)
bit 10: antenna in warm cal position (0 = no, unless bits 9, 11, and 12 also 0; 1 = yes)
bit 9: full scan mode (0 = no; 1 = yes)
bits 5 - 8: <zero fill>
bit 4: survival heater (0 = off; 1 = on)
bit 3: module power (0 = disconnect; 1 = connect)
bit 2: compensator motor (0 = off; 1 = on)
bit 1: scanner A2 power (0 = off; 1 = on)
bit 0: <zero fill>		 2503 2504 u 2 1 0    
<Zero Fill> 2505 2508 i 4 1 0    
AMSU-A2 ANALOG HOUSEKEEPING DATA (TIP)
Invalid Data Bit Flags
(if bit = 1, associated telemetry word was not updated during most recent minor frame cycle - possibly due to lost frame)
bits 31-16: <zero fill>
bit 15: Word 15
...
bit 1: Word 1
bit 0: <zero fill>		 2509 2512 u 4 1 0    
Word 1: Scanner Motor Temperature
Word 2: Compensator Motor Temperature
Word 3: RF Shelf Temperature
Word 4: Warm Load A2 Temperature
Word 5: Compensator Motor Current (Avg)
Word 6: Antenna Drive Motor Current (Avg)
Word 7: +15 VDC (Signal Processing)
Word 8: +15 VDC (Antenna Drive)
Word 9: -15 VDC (Signal Processing)
Word 10: -15 VDC (Antenna Drive)
Word 11: +8 VDC (Receiver)
Word 12: +5 VDC (Signal Processing)
Word 13: +5 VDC (Antenna Drive)
Word 14: GDO Voltage Ch. 1 (23.8 GHz)
Word 15: GDO Voltage Ch. 2 (31.4 GHz)
Word 16: <Zero Fill>		 2513 2528 u 1 16 0 counts  
FILLER
<Zero Fill> 2529 2560 i 4 8 0    

Amended January 13, 2005

Amended April 12, 2005

Amended May 4, 2005

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