NOAA-K/L/M Level 1b HRPT Header Format

Header sections

Associated Links

Notes

This information has been produced from documents provided by NOAA/NESDIS.
The original files may be obtained by ftp from ftp://ftp2.ncdc.noaa.gov/pub/doc/noaaklm/

A packed NOAA Level 1b format file consists of a set of records of size 15872 bytes. The first record is the file header, subsequent records each containing one scan line of HRPT data.

Start Octet - Offset location of the first octet (8-bit byte) in the defined field from the beginning of the file starting with octet 1.

End Octet - Offset location of the last octet in the defined field from beginning of file.

DT - Data Type (i - integer, u - unsigned integer, c - ASCII character). All integers are stored in Big Endian (IBM370) order.

Word Size - Number of octets per data word.

SF - Scaling Factor. x=y/10n, where x is the desired floating point value, y is the stored integer value for the defined field, and n is the number indicated in the scaling factor column for that field. Number of Words Number of words of indicated size and type contained in the defined field.

General Information

Start Octet End Octet DT Word Size SF Number of Words Field description
1 3 c 3 0 1 Data Set Creation Site ID : (CMS = Centre de Meteorologie Spatiale/France; DSS = Dundee Satellite Receiving Station; NSS = National Environmental Satellite, Data and Information Service/USA; UKM = United Kingdom Meteorological Office/UK)
4 4 c 1 0 1 <ASCII blank = x20>
5 6 u 2 0 1 Level 1b Format Version Number
7 8 u 2 0 1 Level 1b Format Version Year (e.g. 1999)
9 10 u 2 0 1 Level 1b Format Version Day of Year (e.g. 365)
11 12 u 2 0 1 <Reserved for Logical Record Length>
13 14 u 2 0 1 <Reserved for Block Size>
15 16 u 2 0 1 Count of Header Records in this Data Set
17 22 i 2 0 3 <Zero Fill>
23 64 c 42 0 1 Data Set Name
65 72 c 8 0 1 Processing Block Identification
73 74 u 2 0 1 NOAA Spacecraft Identification Code
75 76 u 2 0 1 Instrument ID
77 78 u 2 0 1 Data Type Code (1 = LAC; 2 = GAC; 3 = HRPT; 4 = TIP; 5 = HIRS; 6 = MSU; 7 = SSU; 8 = DCS; 9 = SEM; 10= AMSU-A; 11 = AMSU-B)
79 80 u 2 0 1 TIP Source Code (0 = not applicable; 1 = GAC embedded; 2 = stored; 3 = third CDA; 4 = HRPT embedded)
81 84 u 4 0 1 Start of Data Set Day Count starting from 0 at 00h, 1 Jan 1950
85 86 u 2 0 1 Start of Data Set Year (e.g. 1999)
87 88 u 2 0 1 Start of Data Set Day of Year (e.g. 365)
89 92 u 4 0 1 Start of Data Set UTC Time of Day in milliseconds
93 96 u 4 0 1 End of Data Set Day Count starting from 0 at 00h, 1 Jan 1950
97 98 u 2 0 1 End of Data Set Year (e.g. 1999)
99 100 u 2 0 1 End of Data Set Day of Year (e.g. 365)
101 104 u 4 0 1 End of Data Set UTC Time of Day in milliseconds
105 106 u 2 0 1 Year of Last CPIDS Update (e.g. 1999)
107 108 u 2 0 1 Day of Year of Last CPIDS Update (e.g. 365)
109 116 i 2 0 4 <Zero Fill>

Data Set Quality Indicators

Start Octet End Octet DT Word Size SF Number of Words Field description
117 120 u 4 0 1 Instrument Status bits 31-16: <zero fill> bit 15: motor/telemetry (0 = off; 1 = on) bit 14: electronics/telemetry (0 = off; 1 = on) bit 13: channel 1 status (0 = disable; 1 = enable) bit 12: channel 2 status (0 = disable; 1 = enable) bit 11: channel 3a status(0 = disable; 1 = enable) bit 10: channel 3b status(0 = disable; 1 = enable) bit 9: channel 4 status (0 = disable; 1 = enable) bit 8: channel 5 status (0 = disable; 1 = enable) bit 7: channel 3a/3b select status bit 6: voltage calibrate status (0 = off; 1 = on) bit 5: cooler heat (0 = off; 1 = on) bit 4: scan motor (0 = low; 1 = high) bit 3: telemetry lock (0 = off; 1 = lock) bit 2: earth shield (0 = disable; 1 = deploy) bit 1: patch control(0 = off; 1 = on) bit 0: <zero fill>
121 122 i 2 0 1 <Zero Fill>
123 124 u 2 0 1 Record Number of Status Change (if 0, none occurred)
125 128 u 4 0 1 Second Instrument Status (if previous word is 0, no change)
129 130 u 2 0 1 Count of Data Records in this Data Set
131 132 u 2 0 1 Count of Calibrated, Earth Located Scan Lines in this Data Set
133 134 u 2 0 1 Count of Missing Scan Lines
135 136 u 2 0 1 Count of Data Gaps in this Data Set
137 138 u 2 0 1 Count of Data Frames Without Frame Sync Word Errors
139 140 u 2 0 1 Count of PACS Detected TIP Parity Errors
141 142 u 2 0 1 Sum of All Auxiliary Sync Errors Detected in the Input Data
143 144 u 2 0 1 Time Sequence Error (0 = none; otherwise the record number of the first occurrence)
145 146 u 2 0 1 Time Sequence Error Code. These are bit flags taken from Scan Line Quality Flags Time Problem Code on data record reported in Time Sequence Error field above. If a bit is on (=1) then the statement is true. bits 15 - 8: <zero fill> 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 or may not be associated with a spacecraft clock update. bit 4: start of a sequence that apparently repeats scan times that have been previously accepted. bits 3 - 0: <zero fill>
147 148 u 2 0 1 SOCC Clock Update Indicator (0 = none during this orbit; otherwise the record number of the first occurrence)
149 150 u 2 0 1 Earth Location Error Indicator (0 = none during this orbit; otherwise the record number of the first occurrence)
151 152 u 2 0 1 Earth Location Error Code These are bit flags taken from Scan Line Quality Flags Earth Location Problem Code on data record reported in Earth Location Error Indicator field above. If a bit is on (=1) then the statement is true. bits 15 - 8: <zero fill> 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. bits 3-0: <zero fill>
153 154 u 2 0 1 PACS Status Bit Field bit 15-3: <zero fill> bit 2: pseudo noise (0 = normal data; 1 = P/N data) bit 1: tape direction (0 = time decrementing) bit 0: data mode (0 = test data; 1 = flight data)
155 156 u 2 0 1 PACS Data Source (0 = unused; 1 = Gilmore; 2 = Wallops; 3 = SOCC)
157 160 i 4 0 1 <Zero Fill>
161 168 c 8 0 1 <Reserved for the Ingester>
169 176 c 8 0 1 <Reserved for Decommutation>
177 186 i 2 0 5 <Zero Fill>

Calibration

Start Octet End Octet DT Word Size SF Number of Words CALIBRATION
187 188 u 2 0 1 Ramp/Auto Calibration Indicators Bit Field bit 5: ramp non-linearity for GAC, LAC, and HRPT ch 5 bit 4: ramp non-linearity for GAC, LAC, and HRPT ch 4 bit 3: ramp non-linearity for GAC, LAC, and HRPT ch 3b bit 2: ramp non-linearity for GAC, LAC, and HRPT ch 3a bit 1: ramp non-linearity for GAC, LAC, and HRPT ch 2 bit 0: ramp non-linearity for GAC, LAC, and HRPT ch 1
189 190 u 2 0 1 Year of Most Recent Solar Channel Calibration (e.g. 1999)
191 192 u 2 0 1 Day of Year of Most Recent Solar Channel Calibration (e.g. 365)
193 194 u 2 0 1 Primary Calibration Algorithm ID
195 196 u 2 0 1 Primary Calibration Algorithm Selected Options bit 15: <zero fill> bit 14: Ch 5 resolution (0 = high; 1 = low) bit 13: Ch 5 substitution coefficients (0 = no; 1 = yes) bits 12-10: <zero fill> bit 9: Ch 4 resolution (0 = high; 1 = low) bit 8: Ch 4 substitution coefficients (0 = no; 1 = yes) bits 7-5: <zero fill> bit 4: Ch 3b resolution (0 = high; 1 = low) bit 3: Ch 3b substitution coefficients (0 = no; 1 = yes) bits 2-0: <zero fill>
197 198 u 2 0 1 Secondary Calibration Algorithm ID
199 200 u 2 0 1 Secondary Calibration Algorithm Selected Options bit 15: <zero fill> bit 14: Ch 5 resolution (0 = high; 1 = low) bit 13: Ch 5 substitution coefficients (0 = no; 1 = yes) bits 12-10: <zero fill> bit 9: Ch 4 resolution (0 = high;1 = low) bit 8: Ch 4 substitution coefficients (0 = no; 1 = yes) bits 7-5:<zero fill> bit 4: Ch 3b resolution (0 = high; 1 = low) bit 3: Ch 3b substitution coefficients (0 = no; 1 = yes) bits 2-0: <zero fill>
201 202 i 2 2 1 IR Target Temperature 1 Conversion Coefficient 1
203 204 i 2 5 1 IR Target Temperature 1 Conversion Coefficient 2
205 206 i 2 8 1 IR Target Temperature 1 Conversion Coefficient 3
207 208 i 2 8 1 IR Target Temperature 1 Conversion Coefficient 4
209 210 i 2 8 1 IR Target Temperature 1 Conversion Coefficient 5
211 212 i 2 8 1 IR Target Temperature 1 Conversion Coefficient 6
213 214 i 2 2 1 IR Target Temperature 2 Conversion Coefficient 1
215 216 i 2 5 1 IR Target Temperature 2 Conversion Coefficient 2
217 218 i 2 8 1 IR Target Temperature 2 Conversion Coefficient 3
219 220 i 2 8 1 IR Target Temperature 2 Conversion Coefficient 4
221 222 i 2 8 1 IR Target Temperature 2 Conversion Coefficient 5
223 224 i 2 8 1 IR Target Temperature 2 Conversion Coefficient 6
225 226 i 2 2 1 IR Target Temperature 3 Conversion Coefficient 1
227 228 i 2 5 1 IR Target Temperature 3 Conversion Coefficient 2
229 230 i 2 8 1 IR Target Temperature 3 Conversion Coefficient 3
231 232 i 2 8 1 IR Target Temperature 3 Conversion Coefficient 4
233 234 i 2 8 1 IR Target Temperature 3 Conversion Coefficient 5
235 236 i 2 8 1 IR Target Temperature 3 Conversion Coefficient 6
237 238 i 2 2 1 IR Target Temperature 4 Conversion Coefficient 1
239 240 i 2 5 1 IR Target Temperature 4 Conversion Coefficient 2
241 242 i 2 8 1 IR Target Temperature 4 Conversion Coefficient 3
243 244 i 2 8 1 IR Target Temperature 4 Conversion Coefficient 4
245 246 i 2 8 1 IR Target Temperature 4 Conversion Coefficient 5
247 248 i 2 8 1 IR Target Temperature 4 Conversion Coefficient 6
249 256 i 4 0 2 <Zero Fill>

Radiance Conversion

Start Octet End Octet DT Word Size SF Number of Words Field description
257 260 i 4 1 1 Ch 1 Solar Filtered Irradiance in Wavelength
261 264 i 4 3 1 Ch 1 Equivalent Filter Width in Wavelength
265 268 i 4 1 1 Ch 2 Solar Filtered Irradiance in Wavelength
269 272 i 4 3 1 Ch 2 Equivalent Filter Width in Wavelength
273 276 i 4 1 1 Ch 3a Solar Filtered Irradiance in Wavelength
277 280 i 4 3 1 Ch 3a Equivalent Filter Width in Wavelength
281 284 i 4 2 1 Ch 3b Central Wavenumber
285 288 i 4 5 1 Ch 3b Constant 1
289 292 i 4 6 1 Ch 3b Constant 2
293 296 i 4 3 1 Ch 4 Central Wavenumber
297 300 i 4 5 1 Ch 4 Constant 1
301 304 i 4 6 1 Ch 4 Constant 2
305 308 i 4 3 1 Ch 5 Central Wavenumber
309 312 i 4 5 1 Ch 5 Constant 1
313 316 i 4 6 1 Ch 5 Constant 2
317 328 i 4 0 3 <Zero Fill>

Navigation

Start Octet End Octet DT Word Size SF Number of Words Field description
329 336 c 8 0 1 Reference Ellipsoid Model ID
337 338 u 2 1 1 Nadir Earth Location Tolerance in Kilometers
339 340 u 2 0 1 Earth Location Bit Field bits 15 - 2: <zero fill> bit 1: reasonableness test active (0 = inactive) bit 0: attitude error correction (0 = not corrected)
341 342 i 2 0 1 <Zero Fill>
343 344 i 2 3 1 Constant Roll Attitude Error in Degrees
345 346 i 2 3 1 Constant Pitch Attitude Error in Degrees
347 348 i 2 3 1 Constant Yaw Attitude Error in Degrees
349 350 u 2 0 1 Epoch Year for Orbit Vector
351 352 u 2 0 1 Day of Epoch Year for Orbit Vector
353 356 u 4 0 1 Epoch UTC Time of Day in milliseconds for Orbit Vector
357 360 i 4 5 1 Semi-major Axis in Kilometers
361 364 i 4 8 1 Eccentricity
365 368 i 4 5 1 Inclination in Degrees
369 372 i 4 5 1 Argument of Perigee in Degrees
373 376 i 4 5 1 Right Ascension of the Ascending Node in Degrees
377 380 i 4 5 1 Mean Anomaly in Degrees
381 384 i 4 5 1 Position Vector X Component in Kilometers
385 388 i 4 5 1 Position Vector Y Component in Kilometers
389 392 i 4 5 1 Position Vector Z Component in Kilometers
393 396 i 4 8 1 Velocity Vector X-dot Component in Kilometers/second
397 400 i 4 8 1 Velocity Vector Y-dot Component in Kilometers/second
401 404 i 4 8 1 Velocity Vector Z-dot Component in Kilometers/second
405 408 u 4 6 1 Earth/Sun Distance Ratio
409 424 i 4 0 4 <Zero Fill>

Analog Telemetry Conversion

Start Octet End Octet DT Word Size SF Number of Words Field description
425 426 i 2 2 1 Patch Temperature Conversion Coefficient 1
427 428 i 2 2 1 Patch Temperature Conversion Coefficient 2
429 430 i 2 2 1 Patch Temperature Conversion Coefficient 3
431 432 i 2 2 1 Patch Temperature Conversion Coefficient 4
433 434 i 2 2 1 Patch Temperature Conversion Coefficient 5
435 436 i 2 2 1 <Reserved>
437 438 i 2 2 1 Patch Temperature Extended Conversion Coefficient 1
439 440 i 2 2 1 Patch Temperature Extended Conversion Coefficient 2
441 442 i 2 2 1 Patch Temperature Extended Conversion Coefficient 3
443 444 i 2 2 1 Patch Temperature Extended Conversion Coefficient 4
445 446 i 2 2 1 Patch Temperature Extended Conversion Coefficient 5
447 448 i 2 2 1 <Reserved>
449 450 i 2 2 1 Patch Power Conversion Coefficient 1
451 452 i 2 2 1 Patch Power Conversion Coefficient 2
453 454 i 2 2 1 Patch Power Conversion Coefficient 3
455 456 i 2 2 1 Patch Power Conversion Coefficient 4
457 458 i 2 2 1 Patch Power Conversion Coefficient 5
459 460 i 2 2 1 <Reserved>
461 462 i 2 2 1 Radiator Temperature Conversion Coefficient 1
463 464 i 2 2 1 Radiator Temperature Conversion Coefficient 2
465 466 i 2 2 1 Radiator Temperature Conversion Coefficient 3
467 468 i 2 2 1 Radiator Temperature Conversion Coefficient 4
469 470 i 2 2 1 Radiator Temperature Conversion Coefficient 5
471 472 i 2 2 1 <Reserved>
473 474 i 2 2 1 Blackbody Temperature 1 Conversion Coefficient 1
475 476 i 2 2 1 Blackbody Temperature 1 Conversion Coefficient 2
477 478 i 2 2 1 Blackbody Temperature 1 Conversion Coefficient 3
479 480 i 2 2 1 Blackbody Temperature 1 Conversion Coefficient 4
481 482 i 2 2 1 Blackbody Temperature 1 Conversion Coefficient 5
483 484 i 2 2 1 <Reserved>
485 486 i 2 2 1 Blackbody Temperature 2 Conversion Coefficient 1
487 488 i 2 2 1 Blackbody Temperature 2 Conversion Coefficient 2
489 490 i 2 2 1 Blackbody Temperature 2 Conversion Coefficient 3
491 492 i 2 2 1 Blackbody Temperature 2 Conversion Coefficient 4
493 494 i 2 2 1 Blackbody Temperature 2 Conversion Coefficient 5
495 496 i 2 2 1 <Reserved>
497 498 i 2 2 1 Blackbody Temperature 3 Conversion Coefficient 1
499 500 i 2 2 1 Blackbody Temperature 3 Conversion Coefficient 2
501 502 i 2 2 1 Blackbody Temperature 3 Conversion Coefficient 3
503 504 i 2 2 1 Blackbody Temperature 3 Conversion Coefficient 4
505 506 i 2 2 1 Blackbody Temperature 3 Conversion Coefficient 5
507 508 i 2 2 1 <Reserved>
509 510 i 2 2 1 Blackbody Temperature 4 Conversion Coefficient 1
511 512 i 2 2 1 Blackbody Temperature 4 Conversion Coefficient 2
513 514 i 2 2 1 Blackbody Temperature 4 Conversion Coefficient 3
515 516 i 2 2 1 Blackbody Temperature 4 Conversion Coefficient 4
517 518 i 2 2 1 Blackbody Temperature 4 Conversion Coefficient 5
519 520 i 2 2 1 <Reserved>
521 522 i 2 2 1 Electronics Current Conversion Coefficient 1
523 524 i 2 2 1 Electronics Current Conversion Coefficient 2
525 526 i 2 2 1 Electronics Current Conversion Coefficient 3
527 528 i 2 2 1 Electronics Current Conversion Coefficient 4
529 530 i 2 2 1 Electronics Current Conversion Coefficient 5
531 532 i 2 2 1 <Reserved>
533 534 i 2 2 1 Motor Current Conversion Coefficient 1
535 536 i 2 2 1 Motor Current Conversion Coefficient 2
537 538 i 2 2 1 Motor Current Conversion Coefficient 3
539 540 i 2 2 1 Motor Current Conversion Coefficient 4
541 542 i 2 2 1 Motor Current Conversion Coefficient 5
543 544 i 2 2 1 <Reserved>
545 546 i 2 2 1 Earth Shield Position Conversion Coefficient 1
547 548 i 2 2 1 Earth Shield Position Conversion Coefficient 2
549 550 i 2 2 1 Earth Shield Position Conversion Coefficient 3
551 552 i 2 2 1 Earth Shield Position Conversion Coefficient 4
553 554 i 2 2 1 Earth Shield Position Conversion Coefficient 5
555 556 i 2 2 1 <Reserved>
557 558 i 2 2 1 Electronics Temperature Conversion Coefficient 1
559 560 i 2 2 1 Electronics Temperature Conversion Coefficient 2
561 562 i 2 2 1 Electronics Temperature Conversion Coefficient 3
563 564 i 2 2 1 Electronics Temperature Conversion Coefficient 4
565 566 i 2 2 1 Electronics Temperature Conversion Coefficient 5
567 568 i 2 2 1 <Reserved>
569 570 i 2 2 1 Cooler Housing Temperature Conversion Coefficient 1
571 572 i 2 2 1 Cooler Housing Temperature Conversion Coefficient 2
573 574 i 2 2 1 Cooler Housing Temperature Conversion Coefficient 3
575 576 i 2 2 1 Cooler Housing Temperature Conversion Coefficient 4
577 578 i 2 2 1 Cooler Housing Temperature Conversion Coefficient 5
579 580 i 2 2 1 <Reserved>
581 582 i 2 2 1 Baseplate Temperature Conversion Coefficient 1
583 584 i 2 2 1 Baseplate Temperature Conversion Coefficient 2
585 586 i 2 2 1 Baseplate Temperature Conversion Coefficient 3
587 588 i 2 2 1 Baseplate Temperature Conversion Coefficient 4
589 590 i 2 2 1 Baseplate Temperature Conversion Coefficient 5
591 592 i 2 2 1 <Reserved>
593 594 i 2 2 1 Motor Housing Temperature Conversion Coefficient 1
595 596 i 2 2 1 Motor Housing Temperature Conversion Coefficient 2
597 598 i 2 2 1 Motor Housing Temperature Conversion Coefficient 3
599 600 i 2 2 1 Motor Housing Temperature Conversion Coefficient 4
601 602 i 2 2 1 Motor Housing Temperature Conversion Coefficient 5
603 604 i 2 2 1 <Reserved>
605 606 i 2 2 1 A/D Converter Temperature Conversion Coefficient 1
607 608 i 2 2 1 A/D Converter Temperature Conversion Coefficient 2
609 610 i 2 2 1 A/D Converter Temperature Conversion Coefficient 3
611 612 i 2 2 1 A/D Converter Temperature Conversion Coefficient 4
613 614 i 2 2 1 A/D Converter Temperature Conversion Coefficient 5
615 616 i 2 2 1 <Reserved>
617 618 i 2 2 1 Detector #4 Bias Voltage Conversion Coefficient 1
619 620 i 2 2 1 Detector #4 Bias Voltage Conversion Coefficient 2
621 622 i 2 2 1 Detector #4 Bias Voltage Conversion Coefficient 3
623 624 i 2 2 1 Detector #4 Bias Voltage Conversion Coefficient 4
625 626 i 2 2 1 Detector #4 Bias Voltage Conversion Coefficient 5
627 628 i 2 2 1 <Reserved>
629 630 i 2 2 1 Detector #5 Bias Voltage Conversion Coefficient 1
631 632 i 2 2 1 Detector #5 Bias Voltage Conversion Coefficient 2
633 634 i 2 2 1 Detector #5 Bias Voltage Conversion Coefficient 3
635 636 i 2 2 1 Detector #5 Bias Voltage Conversion Coefficient 4
637 638 i 2 2 1 Detector #5 Bias Voltage Conversion Coefficient 5
639 640 i 2 2 1 <Reserved>
641 642 i 2 0 1 Channel 3b Blackbody View Conversion Coefficient 1
643 644 i 2 0 1 Channel 3b Blackbody View Conversion Coefficient 2
645 646 i 2 0 1 Channel 3b Blackbody View Conversion Coefficient 3
647 648 i 2 0 1 Channel 3b Blackbody View Conversion Coefficient 4
649 650 i 2 0 1 Channel 3b Blackbody View Conversion Coefficient 5
651 652 i 2 0 1 <Reserved>
653 654 i 2 2 1 Channel 4 Blackbody View Conversion Coefficient 1
655 656 i 2 2 1 Channel 4 Blackbody View Conversion Coefficient 2
657 658 i 2 2 1 Channel 4 Blackbody View Conversion Coefficient 3
659 660 i 2 2 1 Channel 4 Blackbody View Conversion Coefficient 4
661 662 i 2 2 1 Channel 4 Blackbody View Conversion Coefficient 5
663 664 i 2 2 1 <Reserved>
665 666 i 2 0 1 Channel 5 Blackbody View Conversion Coefficient 1
667 668 i 2 0 1 Channel 5 Blackbody View Conversion Coefficient 2
669 670 i 2 0 1 Channel 5 Blackbody View Conversion Coefficient 3
671 672 i 2 0 1 Channel 5 Blackbody View Conversion Coefficient 4
673 674 i 2 0 1 Channel 5 Blackbody View Conversion Coefficient 5
675 676 i 2 0 1 <Reserved>
677 678 i 2 2 1 Reference Voltage Conversion Coefficient 1
679 680 i 2 2 1 Reference Voltage Conversion Coefficient 2
681 682 i 2 2 1 Reference Voltage Conversion Coefficient 3
683 684 i 2 2 1 Reference Voltage Conversion Coefficient 4
685 686 i 2 2 1 Reference Voltage Conversion Coefficient 5
687 688 i 2 2 1 <Reserved>
689 <EOR> i 4 0 ?? <Zero Fill> <EOR>= 15872 for packed datasets <EOR>= 22528 for unpacked datasets


Author : Andrew Prosser

Last updated : 24th September 1998