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V/51        Data Inventory of Space-Based Obs, Ver 1.1 (Brotzman+ 1987)

Data Inventory of Space-Based Celestial Observations, Version 1.1 Brotzman L.E., Hill R.S., Mead J.M. <ADC Bull. 1, 312 (1987)>
ADC_Keywords: References; Space observations Description: The "Data Inventory of Space-Based Celestial Observations Version 1.0" (DISCO) is a directory to data contained in sixteen catalogs dealing with observations from space. (Sounding rocket, solar, and planetary observations have been excluded.) The information extracted from the catalogs includes names of objects observed, 1950 equatorial coordinates, and the name of the catalog or instrument. A second file contains full references to the source catalogs and other pertinent information. The purpose of creating DISCO is (1) to unify astronomical observations from space, which are at present scattered and hard to locate, and then (2) to provide a machine-readable index to these observations, thus enabling easy access by computer. Such a directory will permit an astronomer to find out what objects have been observed from space, which spacecraft and instruments made the observations, and where to go to find the data themselves. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file disco.dat 118 74821 Catalog Data refs.dat 80 131 References
Byte-by-byte Description of file: disco.dat
Bytes Format Units Label Explanations
1- 15 A15 --- PID *Primary or "mission" id 16- 30 A15 --- SID *Secondary id 31- 45 A15 --- TID *Tertiary id 47- 48 I2 h RAh *RA 1950 hours 50- 51 I2 min RAm *RA 1950 minutes 53- 57 F5.2 s RAs *[0.,60.] RA 1950 seconds 59 I1 --- pRA *RA precision 61 A1 --- DE- Sign of dec 62- 63 I2 deg DEd Dec 1950 degrees 65- 66 I2 arcmin DEm Dec 1950 arc minutes 68- 72 F5.2 arcsec DEs [0.,60.] Dec 1950 arc seconds 74 I1 --- pDE *Dec precision 76- 78 I3 --- r_RAh *Coordinate reference number 80-114 A35 --- Cat *Mission or catalog 116-118 I3 --- r_Cat *Primary reference number
Note on PID, SID, TID: Space is provided for three object identifiers. The identifiers are listed according to the following priority: (1) "Mission id", (2) HD or NGC, (3) other. Namely, (1) Primary id, (2) Secondary, and (3) Tertiary id. Note on RAh, RAm, RAs: Equatorial coordinates, equinox 1950.0. Some of the original catalogs do not have coordinates, in which case coordinates have been obtained from a standard ground-based catalog. See coord reference below. Note on pRA: RA precision. Number of digits HH MM SS.SS given in the source catalog; for example, 6 is the code for whole numbers of seconds. Note on pDE: DEC precision. Number of digits DD MM SS.SS given in the source catalog; for example, 8 is the code for hundredths of seconds. Note on r_RAh: Coord reference. Reference number for the source of coordinates, as given in the reference file; see refs.dat. Note on Cat: Mission or catalog. Identification of the satellite or instrument that observed the object or the name of the catalog from which the data were taken. Note on r_Cat: Primary reference. Reference number for the primary source of information, as given in the reference file; see refs.dat below.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 3 I3 --- RefNum *? Reference number 5- 8 A4 --- StatNum *ADC Status Report number 10- 18 A9 --- SCAbbr *Satellite or catalog abbrev. 19- 23 I5 --- Rcount *? Record count 25- 80 A56 --- Ref *Reference
Note on RefNum: Reference number. The number given the catalog when compiled into the DISCO. If this field is blank, the record is a continuation of the previous record. If the reference number is greater than or equal to 100, the referenced catalog was used only to find coordinates of objects. Note on StatNum: Status Report no. The number under which the catalog may be located in the ADC Status Report. Note on SCAbbr: This is the abbreviation given the satellite or catalog by ADC personnel. Note on Rcount: Record count. The number of records from this reference that can be found in DISCO. Note on Ref: Reference. This field includes the full title and reference of the original paper that presented the data; or the name of a catalog used for coordinates only if the reference number is greater than 100 (see above). See the description for bytes 75-78 and 115-118 in disco.dat.
History and Remarks: The ReadMe file incorporates the original ADC documentation by Brotzman, Hill, and Mead (1986). "The Data Inventory of Space-Based Celestial Observations" (DISCO) was produced at the Astronomical Data Center (ADC), NASA Goddard Space Flight Center. A search through the ADC Status Report was conducted for all catalogs containing data from satellite observations. Individual Fortran programs were written that produced a DISCO "submaster" from each catalog. The submasters were then merged and sorted by equatorial coordinates. In some cases, the input catalogs were edited with Fortran programs or a text editor to produce a preliminary dataset that was more amenable to conversion to DISCO format. In addition, coordinates were obtained from ground-based catalogs for objects that do not have them in the original space-based lists (see the description of the coordinate reference in "Main Inventory File disco.dat above). Complete versions of the catalogs represented in DISCO are available from the ADC. Reference: Brotzman, L. E., Hill, R. S., Mead, J. M. 1986, Astronomical Data Center Bulletin (in publication).
(End) C.-H. Joseph Lyu [Hughes STX/NASA] 16-Aug-1995
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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