2MAPPS Software Interface Specification QUA07 3.9 (011119; D. Kirkpatrick) Interface Name: QA Scan Information Table (SIT) Type of Interface: ASCII text Written By: SCANSCI + customized software ___________ R. Hurt/G. Kopan Read By: offline analysis program ________________ R. Stiening DBMAN ___________________________________ T. Evans File Name: qasit.{yymmdd}, where {yymmdd} is the file creation date. This file lives at /l7/ops/sitdb. Description: The QA Scan Information Table (SIT) contains a record of science scans observed by either of the 2MASS observing facilities. Only scans that have passed through version 3.0 OPS processing are included here. Each entry contains basic information on the scan (tile number, date, hemisphere, scan number, RA and Dec centers, etc.) and each of the quality assessments that went into deriving the scan's final quality score (including components for photometry, untracked seeing, background residuals, banding, and quadrant jumps). Also given for each scan are the quality factors derived from each of the quality assessment values above. The file is sorted by increasing tile number. If a tile has been scanned and processed more than once there will be multiple entries in the SIT with the same tile number. These entries are sorted in order of date of observation. The most recent observation is listed first. Steps needed to create the SIT file: After a new night has been processed through version 3.0 OPS, a {yymmddh}.sit file is created and deposited into the /l7/ops/sitdb/nsit/ directory. Once a week, on Wednesday, the accumulated nightly files will be concatenated, checked, and sorted into an updated table by running the makesit script. The result is the SIT file described in this document. The last four columns of the SIT will be filled in at the University of Massachusetts. For this reason provision has been made to indicate in the header the date when the file was modified at the University. File header: The header is in standard IPAC table header format. The first line gives the version number, run date, and run time for the program (the customized software) creating the file. The second and third header lines give the date and time that the file was last modified by IPAC or by UMass, respectively. The fourth header line lists the number of actual entries in the table, not counting the header lines. Each of the first four header lines is in A60 format. The 5th-8th header lines (in A787 format) give the field identifier, data type, and units for each column in the file. An example header line is shown below: \ YYYYMMDD HHMMSS Date last run by customized software VX.X 99XXXX. \ YYYYMMDD HHMMSS Date last modified at IPAC. \ YYYYMMDD HHMMSS Date last modified at UMass. \ NNNNN data rows in this file. | Tile | Date |H|Scn|S| Ra | Dec | Glat | Glon |A|D|C| ... | int | int |c|int| | real | real | real | real |i|i|i| ... | | | | | | | | | | | | | ... | | | | | | deg | deg | deg | deg | | | | ... Specification of Output Variables --------------------------------- Basic Scan Info: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 001-007 Tile Tile number -- int I7 -- 0-89000, 100000-189000 log/{yymmddh}.lgo 200000-289000, or 300000-389000 008-014 Date Observation date -- int I7 -- 000101 to 030101 or log/{yymmddh}.lgo 970521 to 991231 015-016 H Observatory location -- int A2 -- n or s log/{yymmddh}.lgo 017-020 Scn Nightly scan number -- int I4 -- 1 to 999 log/{yymmddh}.lgo 021-022 S Scanning direction -- int I2 -- 0 or 1 log/{yymmddh}.lgo 023-032 RA RA of scan center point (J2000) deg r*4 F10.4 -- 0. to 360. datequal/{yymmddh}.pfqqas 033-042 Decl Dec of scan center point (J2000) deg r*4 F10.4 -- -90. to 90. datequal/{yymmddh}.pfqqas 043-052 Glat Approx. galactic lat. of scan center deg r*4 F10.4 -- 0. to 360. computed by SCANSCI 053-062 Glon Approx. galactic long. of scan center deg r*4 F10.4 -- -90. to 90. computed by SCANSCI 063-064 A Array configuration (original/modified) -- int I2 -- 0 or 1 computed by SCANSCI 065-066 D Dithering pattern (non-optimal/optimal) -- int I2 -- 0 or 1 computed by SCANSCI 067-068 C Calibration strategy (old/new) -- int I2 -- 0 or 1 computed by SCANSCI 069-075 NJ Number of J band detections -- int I7 -- 0 to 999999 s{nnn}/qual/sq{nnn}.bmg 076-082 NH Number of H band detections -- int I7 -- 0 to 999999 s{nnn}/qual/sq{nnn}.bmg 083-089 NK Number of Ks band detections -- int I7 -- 0 to 999999 s{nnn}/qual/sq{nnn}.bmg 090-096 Jdens (not computed; placeholder for now) -- r*4 F7.3 -9.9 0. to 6. (not yet computed) 097-103 Hdens (not computed; placeholder for now) -- r*4 F7.3 -9.9 0. to 6. (not yet computed) 104-110 Kdens Log of Ks max. src density (Ks<14.0 mag) -- r*4 F7.3 -- 0. to 6. s{nnn}/qual/galworks.tbl 111-117 Nbmg Number of detections after bandmerging -- int I7 -- 0 to 999999 s{nnn}/qual/sq{nnn}.bmg 118-124 Jsh Average J seeing shape in scan -- r*4 F7.3 -9.9 0. to 9. datequal/q{yymmddh}.psf.see 125-131 Hsh Average H seeing shape in scan -- r*4 F7.3 -9.9 0. to 9. datequal/q{yymmddh}.psf.see 132-138 Ksh Average Ks seeing shape in scan -- r*4 F7.3 -9.9 0. to 9. datequal/q{yymmddh}.psf.see 139-145 MxJsh Maximum J seeing shape in scan -- r*4 F7.3 -9.9 0. to 9. datequal/{yymmddh}.cnoise 146-152 MxHsh Maximum H seeing shape in scan -- r*4 F7.3 -9.9 0. to 9. datequal/{yymmddh}.cnoise 153-159 MxKsh Maximum Ks seeing shape in scan -- r*4 F7.3 -9.9 0. to 9. datequal/{yymmddh}.cnoise 160-169 Jbg Average J frame background DN r*4 F10.3 -9.9 0. to 99999. datequal/q{yymmddh}.bgrnd 170-179 Hbg Average H frame background DN r*4 F10.3 -9.9 0. to 99999. datequal/q{yymmddh}.bgrnd 180-189 Kbg Average Ks frame background DN r*4 F10.3 -9.9 0. to 99999. datequal/q{yymmddh}.bgrnd 190-196 Jrat J image aspect ratio -- r*4 F7.3 -9.9 0. to 1. datequal/q{yymmddh}.psf.see 197-203 Hrat H image aspect ratio -- r*4 F7.3 -9.9 0. to 1. datequal/q{yymmddh}.psf.see 204-210 Krat Ks image aspect ratio -- r*4 F7.3 -9.9 0. to 1. datequal/q{yymmddh}.psf.see (Notes: Tile - 0- 29824 are standard survey tiles with + declination observed from Mt. Hopkins 200000-229824 are standard survey tiles with + declination observed from Cerro Tololo 100000-129824 are standard survey tiles with - declination observed from Mt. Hopkins 300000-329824 are standard survey tiles with - declination observed from Cerro Tololo Tiles with the same sign of declination and the same right-most 5 digits are at the same location on the sky. Tile Numbers by Dec Band -------------------------------------------------------- |Dec |North Tiles |Dec Range|South Tiles |#Tiles|Index | |Band|-------------|---------|-------------|in Dec|First | | |Min |Max |Min |Max |Min |Max | Band |Tile | |----|------|------|----|----|------|------|------|------| 1 29514 29824 84 90 229514 229824 311 1 2 28897 29513 78 84 228897 229513 617 312 3 27980 28896 72 78 227980 228896 917 929 4 26773 27979 66 72 226773 227979 1207 1846 5 25289 26772 60 66 225289 226772 1484 3053 6 23545 25288 54 60 223545 225288 1744 4537 7 21559 23544 48 54 221559 223544 1986 6281 8 19354 21558 42 48 219354 221558 2205 8267 9 16953 19353 36 42 216953 219353 2401 10472 10 14383 16952 30 36 214383 216952 2570 12873 11 11672 14382 24 30 211672 214382 2711 15443 12 8850 11671 18 24 208850 211671 2822 18154 13 5947 8849 12 18 205947 208849 2903 20976 14 2989 5946 6 12 202989 205946 2958 23879 15 0 2988 0 6 200000 202988 2989 26837 16 100000 102988 -6 0 300000 302988 2989 29826 17 102989 105946 -12 -6 302989 305946 2958 32815 18 105947 108849 -18 -12 305947 308849 2903 35773 19 108850 111671 -24 -18 308850 311671 2822 38676 20 111672 114382 -30 -24 311672 314382 2711 41498 21 114383 116952 -36 -30 314383 316952 2570 44209 22 116953 119353 -42 -36 316953 319353 2401 46779 23 119354 121558 -48 -42 319354 321558 2205 49180 24 121559 123544 -54 -48 321559 323544 1986 51385 25 123545 125288 -60 -54 323545 325288 1744 53371 26 125289 126772 -66 -60 325289 326772 1484 55115 27 126773 127979 -72 -66 326773 327979 1207 56599 28 127980 128896 -78 -72 327980 328896 917 57806 29 128897 129513 -84 -78 328897 329513 617 58723 30 129514 129824 -90 -84 329514 329824 311 59340 H - s=south (observed from CTIO); n=north (observed from Mt. Hopkins) S - 0=south-going; 1=north-going. Ra - RA of scan center point; this is "RAcp" in SIS pos12. Dec - Dec of scan center point; this is "DECcp" in SIS pos12. Glat - Approximate galactic latitude as computed from RA and Dec above Glon - Approximate galactic longitude as computed from RA and Dec above A - for north: 0 for <990913n, 1 for >=990913n for south: always 0 D - for north: 0 for <970607n, 1 for >=970607n for south: always 1 C - for north: 0 for <971011n, 1 for >=971011n for south: always 1 ) Astrometric Components: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 211-214 Nty Number of Tycho-2 stars in scan -- int I4 -- 0 to 9999 {yymmddh}.QApm 215-223 Dew Difference of tile and scan E-W asec r*4 F9.3 -- -9999.999 to 99999.999 datequal/{yymmddh}.pfqqas 224-232 Ddec Difference of tile and scan Dec asec r*4 F9.3 -- -9999.999 to 99999.999 datequal/{yymmddh}.pfqqas 233-241 MrgS Coverage margin, south end asec r*4 F9.3 -- -9999.999 to 99999.999 datequal/{yymmddh}.pfqqas 242-250 MrgN Coverage margin, north end asec r*4 F9.3 -- -9999.999 to 99999.999 datequal/{yymmddh}.pfqqas (Notes: Nty - Known as "nTycho" in SIS pos14, this is the number of Tycho stars used as references. Dew - Known as "XSDifEq" in SIS pos12, this is the X-scan difference between equatormost 6-deep frame center (3-band average) and the corresponding tile/cal endpoint. A positive value implies the scan is too far east. Ddec - In-scan difference between reconstructed scan placement and perfect placement with respect to the tile; this is ISDifT in SIS pos12. MrgS - Known as "ISCMrgS" in SIS pos12, this is the in-scan coverage margin at south end of tile. Compares Dec of southmost 6-deep frame center (3-band average) with Dec of tile/cal south endpoint. A positive value implies excess coverage and a negative value missing coverage. MrgN - Known as "ISCMrgN" in SIS pos12, this is the in-scan coverage margin at north end of tile. Compares Dec of northmost 6-deep frame center (3-band average) with Dec of tile/cal north endpoint. A positive value implies excess coverage and a negative value missing coverage. Photometric Components: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 251-257 Jpsp J photometric sensitivity parameter -- r*4 F7.3 -9.9 0. to 30. computed by SCANSCI 258-264 Hpsp H photometric sensitivity parameter -- r*4 F7.3 -9.9 0. to 30. computed by SCANSCI 265-271 Kpsp Ks photometric sensitivity parameter -- r*4 F7.3 -9.9 0. to 30. computed by SCANSCI 272-280 Jzp J phot. zero point, extinction corrected mag r*4 F9.4 -9.9 -1. to 1. datequal/q{yymmddh}.cal 281-289 Hzp H phot. zero point, extinction corrected mag r*4 F9.4 -9.9 -1. to 1. datequal/q{yymmddh}.cal 290-298 Kzp Ks phot. zero point, extinction corrected mag r*4 F9.4 -9.9 -1. to 1. datequal/q{yymmddh}.cal 299-307 Jrzp J photometric zero point RMS mag r*4 F9.4 -9.9 -1. to 1. datequal/q{yymmddh}.cal 308-316 Hrzp H photometric zero point RMS mag r*4 F9.4 -9.9 -1. to 1. datequal/q{yymmddh}.cal 317-325 Krzp Ks photometric zero point RMS mag r*4 F9.4 -9.9 -1. to 1. datequal/q{yymmddh}.cal 326-332 Jovlp Maximum J overlap diff. in scan block mag r*4 F7.3 -9.9 -1. to 1. datequal/q{yymmddh}.cumtab 333-339 Hovlp Maximum H overlap diff. in scan block mag r*4 F7.3 -9.9 -1. to 1. datequal/q{yymmddh}.cumtab 340-346 Kovlp Maximum Ks overlap diff. in scan block mag r*4 F7.3 -9.9 -1. to 1. datequal/q{yymmddh}.cumtab (Notes: Jpsp - this is Jsh*(Jbg^0.29) Hpsp - this is Hsh*(Hbg^0.29) Kpsp - this is Ksh*(Kbg^0.29) ) Untracked Seeing Components: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 347-353 Jsee J Seetracker score -- r*4 F7.3 -9.9 -1. to 99. {yymmddh}.seetrack 354-360 Hsee H Seetracker score -- r*4 F7.3 -9.9 -1. to 99. {yymmddh}.seetrack 361-367 Ksee Ks Seetracker score -- r*4 F7.3 -9.9 -1. to 99. {yymmddh}.seetrack 368-373 Jlen J Untracked length arcsec int I6 -9 0 to 21600 {yymmddh}.seetrack 374-379 Hlen H Untracked length arcsec int I6 -9 0 to 21600 {yymmddh}.seetrack 380-385 Klen Ks Untracked length arcsec int I6 -9 0 to 21600 {yymmddh}.seetrack Background Residual Components: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 386-390 Jn3s J coadd noise 3 sigma counter -- int I5 -9 0 to 23 datequal/{yymmddh}.cnoise 391-395 Hn3s H coadd noise 3 sigma counter -- int I5 -9 0 to 23 datequal/{yymmddh}.cnoise 396-400 Kn3s Ks coadd noise 3 sigma counter -- int I5 -9 0 to 23 datequal/{yymmddh}.cnoise 401-405 Jcn4 J coadd noise (4th worst) -- r*4 F5.1 -9.9 -9.8 to 99. datequal/{yymmddh}.cnoise 406-410 Hcn4 H coadd noise (4th worst) -- r*4 F5.1 -9.9 -9.8 to 99. datequal/{yymmddh}.cnoise 411-415 Kcn4 Ks coadd noise (4th worst) -- r*4 F5.1 -9.9 -9.8 to 99. datequal/{yymmddh}.cnoise Banding Diagnostics: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 416-419 Jbl J band. count, left (0.1 DN/Hi-SNR amp) -- int I4 -9 0 to 274 datequal/q{yymmddh}.bandaid 420-423 Hbl H band. count, left (0.1 DN/Hi-SNR amp) -- int I4 -9 0 to 274 datequal/q{yymmddh}.bandaid 424-427 Kbl Ks band. count, left (0.1 DN/Hi-SNR amp) -- int I4 -9 0 to 274 datequal/q{yymmddh}.bandaid 428-431 Jbr J band. count, right (0.1 DN/Hi-SNR amp) -- int I4 -9 0 to 274 datequal/q{yymmddh}.bandaid 432-435 Hbr H band. count, right (0.1 DN/Hi-SNR amp) -- int I4 -9 0 to 274 datequal/q{yymmddh}.bandaid 436-439 Kbr Ks band. count, right (0.1 DN/Hi-SNR amp) -- int I4 -9 0 to 274 datequal/q{yymmddh}.bandaid Quadrant Jumps: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 440-443 Jjp J jump counter -- int I4 -9 0 to 274 datequal/q.backjump.sum 444-447 Hjp H jump counter -- int I4 -9 0 to 274 datequal/q.backjump.sum 448-451 Kjp K jump counter -- int I4 -9 0 to 274 datequal/q.backjump.sum Defacto Quality Factor Summaries: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 452-456 DF1 Nightly phot. calibration factor -- r*4 F5.1 -9.9 0.0 to 1.0 computed by SCANSCI 457-461 DF2 Sensitivity factor -- r*4 F5.1 -9.9 0.0 to 1.0 computed by SCANSCI 462-466 DF3 Ave. and max. seeing shape factor -- r*4 F5.1 -9.9 0.0 to 1.0 computed by SCANSCI 467-471 DF4 Untracked seeing *factor* -- r*4 F5.1 -9.9 0.0 to 1.0 computed by SCANSCI 472-476 DF5 Airglow background residual factor -- r*4 F5.1 -9.9 0.0 to 1.0 computed by SCANSCI 477-481 DF6 (placeholder; not used currently) -- r*4 F5.1 -9.9 0.0 to 1.0 computed by SCANSCI 482-486 DF7 Untracked seeing *flag* -- r*4 F5.1 -9.9 0.0 or 1.0 computed by SCANSCI (Notes: These are the actual quality factors used in computing the final score. DF1 - This is the same as fct1 in SIS qua02. DF2 - This is the same as fct2 in SIS qua02. DF3 - This is the same as fct3 in SIS qua02. DF4 - This is the same as fct4 in SIS qua02. DF5 - This is the same as fct5 in SIS qua02. DF7 - This is the same as fct7 in SIS qua02. ) Override Summaries: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 487-489 OS Final score override -- int I3 -9 0 to 10 {yymmddh}.qagrade 490-494 OF1 Nightly phot. calibration factor -- r*4 F5.1 -9.9 0.0 to 1.0 {yymmddh}.qagrade 495-499 OF2 Sensitivity factor -- r*4 F5.1 -9.9 0.0 to 1.0 {yymmddh}.qagrade 500-504 OF3 Ave. and max. seeing shape factor -- r*4 F5.1 -9.9 0.0 to 1.0 {yymmddh}.qagrade 505-509 OF4 Untracked seeing *factor* -- r*4 F5.1 -9.9 0.0 to 1.0 {yymmddh}.qagrade 510-514 OF5 Airglow background residual factor -- r*4 F5.1 -9.9 0.0 to 1.0 {yymmddh}.qagrade 515-519 OF6 (placeholder; not used currently) -- r*4 F5.1 -9.9 0.0 to 1.0 {yymmddh}.qagrade 520-524 OF7 Untracked seeing *flag* -- r*4 F5.1 -9.9 0.0 or 1.0 {yymmddh}.qagrade (Note: In cases where the quality factor has been overridden, the override value is given by the OF# column. Quality factors that have not been changed will have a "-9.9" in the corresponding OF# column. Specifically used are -- OF1 - If not null (-9.9), this is the override value for fct1. OF2 - If not null (-9.9), this is the override value for fct2. OF3 - If not null (-9.9), this is the override value for fct3. OF4 - If not null (-9.9), this is the override value for fct4. OF5 - If not null (-9.9), this is the override value for fct5. OF7 - If not null (-9.9), this is the override value for fct7. For example, untracked seeing length downgrades based on Jlen, Hlen, or Klen should be ignored if OF4=1.0. Likewise, downgrades due to the Hcn4 factor should be ignored if OF5=1.0. In such cases, by-eye inspection by the QA reviewer has shown that a downgrade is unwarranted. Also, the final score may have been overridden independently of the factor overrides. If OS is not null (-9), its value is the overridden value for the final score.) Final Quality Scores: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 525-527 Q2 Quality score from v2 processing -- int I3 -- 0 to 10 filled in by SCANSCI 528-530 Q3 Quality score from v3 processing -- int I3 -- 0 to 10 computed by SCANSCI Special Flag Fields: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 531-534 F00 H-band glitch -- int I4 -- 0 or 1 {yymmddh}.qagrade 535-538 F01 DB phot overlap downgrade (clouds) -- int I4 -- 0 or 1 {yymmddh}.qagrade 539-542 F02 DB phot overlap downgrade (non-clouds) -- int I4 -- 0 or 1 {yymmddh}.qagrade 543-546 F03 Coadd anomaly flag -- int I4 -- 0 or 1 filled in by SCANSCI 547-550 F04 Astrometric anomaly flag -- int I4 -- 0 or 1 {yymmddh}.qagrade 551-554 F05 Ladybug flag -- int I4 -- 0 or 1 {yymmddh}.qagrade 555-558 F06 (blank) -- int I4 -9 (unknown) {yymmddh}.qagrade 559-562 F07 (blank) -- int I4 -9 (unknown) {yymmddh}.qagrade 563-566 F08 (blank) -- int I4 -9 (unknown) {yymmddh}.qagrade 567-570 F09 (blank) -- int I4 -9 (unknown) {yymmddh}.qagrade 571-574 F10 (blank) -- int I4 -9 (unknown) {yymmddh}.qagrade 575-578 F11 (blank) -- int I4 -9 (unknown) {yymmddh}.qagrade (Notes: F00 - field is set to 1 when a single-frame H-band glitch is found in the scan. F01 - field is set to 1 when a definite clouds is found in the scan after comparison with overlapping scans in database. F02 - field is set to 1 when some other photometric problem (not obviously cloud related) is found in the scan after comparison with overlapping scans in the database. F03 - field is set to 1 when there is an entry for this scan in the Coadd Anomaly Table. F04 - field is set to 1 if scan is known to show astrometric anomalies that may need further investigation. F05 - field is set to 1 if scan contains a ladybug trail. The other fields are placeholders and may be used later.) Blank Fields: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 579-586 Bla0 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 587-594 Bla1 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 595-602 Bla2 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 603-610 Bla3 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 611-618 Bla4 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 619-626 Bla5 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 627-634 Bla6 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 635-642 Bla7 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 643-650 Bla8 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade 651-658 Bla9 (blank) -- int I8 -9 (unknown) {yymmddh}.qagrade (Notes: These fields are placeholders and may be used later.) Released Data Flags: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 659-661 R0 Scan in Sampler Release? -- int I3 -- 0 or 1 filled in by SCANSCI 662-664 R1 Scan in 1IDR? -- int I3 -- 0 or 1 filled in by SCANSCI 665-667 R2 Scan in 2IDR? -- int I3 -- 0 or 1 filled in by SCANSCI 668-670 R3 (blank) -- int I3 -9 (unknown) filled in by SCANSCI 671-673 R4 (blank) -- int I3 -9 (unknown) filled in by SCANSCI (Notes: R0 - field is set to 1 if scan was in the Sampler Release. R1 - field is set to 1 if scan was in the First Incremental Data Release. R2 - field is set to 1 if scan was in the Second Incremental Data Release. The other fields are placeholders and may be used later.) Read Note Field: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 674-675 W Is there special note for this scan? -- int I2 -- 0 or 1 {yymmddh}.qagrade (Notes: W - This field will be 0 if no special note pertains to this scan or 1 if there is a special note, in which case the QAreview for the night should be consulted for additional info. ) Telemetry Fields: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 676-682 Focus Focus setting -- int I7 -99999 -30000 to 30000 /home/roc/obslogs/info/sci.info 683-692 sr_UT Universal Time at start of scan hr r*4 F10.6 -9.9 0. to 24. /home/roc/obslogs/info/sci.info 693-702 sr_LST Local Sidereal Time at start of scan hr r*4 F10.6 -9.9 0. to 24. /home/roc/obslogs/info/sci.info 703-712 sr_HA Hour Angle at start of scan hr r*4 F10.6 -9.9 -6. to 6. /home/roc/obslogs/info/sci.info 713-717 ZD Zenith Distance deg r*4 F5.1 -9.9 0. to 90. /home/roc/obslogs/info/sci.info 718-724 Air_M Airmass -- r*4 F7.3 -9.9 1. to 5.0 /home/roc/obslogs/info/sci.info 725-727 RH Relative Humidity % int I3 -9 0 to 99 /home/roc/obslogs/info/sci.info 728-732 Baro Barometric reading in Hg r*4 F5.1 -9.9 25. to 35. /home/roc/obslogs/info/sci.info 733-738 Air_T Air temperature deg C r*4 F6.1 -99.9 -20. to 40. /home/roc/obslogs/info/sci.info 739-744 Tel_T Telescope tube girdle temperature deg C r*4 F6.1 -99.9 -20. to 40. /home/roc/obslogs/info/sci.info 745-750 Rng_T Head ring temperature deg C r*4 F6.1 -99.9 -20. to 40. /home/roc/obslogs/info/sci.info 751-764 sr_JD Julian Day at start of scan day r*4 F14.5 -- 2400000. to 2500000. computed by SCANSCI Statistics on Tile: cols Name Description Units Type Format Null Range Source ------- ------ ------------------------------------- ------- ---- -------- ---- ----- ------ 765-768 Nob Number of obs of tile in SIT -- int I4 -- 1 to 999 off line program at UMass 769-774 Depch Epoch diff, this obs - earliest obs days int I6 -- 0 to 9999 off line program at UMass 775-780 Depcm Epoch diff, last obs - earliest obs days int I6 -- 0 to 9999 off line program at UMass 781-787 BrKPS Ks mag of brightest point src at Ks mag r*4 F7.3 -- -9.999 to 99.999 off line program at UMass (Notes: Nob - Number of observations of this tile in the current SIT file, regardless of which observatory obtained the data. Depch - Difference in date between this observation of the tile and the earliest observation of the tile in the SIT. Depcm - Difference in date between last observation of this tile in the SIT and the earliest observation in the SIT.