Data Set Information
DATA_SET_NAME IHW COMET HALLEY DIGITIZED PHOTOGRAPHIC SPECTRA V1.0
DATA_SET_ID IHW-C-SPEC-3-DIDR-HALLEY-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION
Data Set Overview : NASA's International Halley Watch (IHW) has created a Comet Halley Archive. The collection of data spans the full wavelength range as submitted by scientists to the IHW. The observations belong to one of the following Disciplines: Amateur, Astrometry, Infrared Studies, Large-Scale Phenomena, Meteor Studies, Near-Nucleus Studies, Photometry and Polarimetry, Radio Studies, and Spectroscopy and Spectrophotometry. The data collected by these nine disciplines were augmented by Spacecraft measurements. The data were submitted to IHW, but the evaluation and selection for the Archive has been the primary responsibility of the Discipline Specialist Teams for each network in cooperation with the Lead Center. The Spectroscopy and Spectrophotometry Network collected 352 files that represented the digitized spectra from plate material. In some cases, the non-Halley targets for the spectroscopic observations can be grouped according to 'laboratory' calibration, dark, bias, flatfield, sky, and photometric standards. In the first category, a large number of 'arcs' and 'lamps' were used as follows: HE-NE, TH-AR, NE-AR, CU-AR, CU-NE, Thorium, Tungsten, Quartz, and Rubidium. For the 'sky' observers used the twilight, moonlight, and blank sky. The most common 'photometric' standards were stars, but observers also included other comets (Hartley-Goode), asteroids (Ceres), reflection nebulae (R8), and emission nebulae (NGC1982, NGC7000). A list of these stellar calibration targets follows: HD 140283, HD 184711, HD89688, HD102870, HD120086, HD13974, HD219188, HD 25680, HD 19445, HD18803, HD30455, HD26912, SAO 1280, HZ15, CD-22 7696, GD 190, GC5106, GC2188, GC2192, G19113213, G 99-37, L745-46A, Feige 15, Feige 56, Landolt 98, Landolt 92, Van Beuren, RHO ORION, CHI 1 ORION, 29 PI LEO. For this data, no distinction about 'reduction' is distinguished for this process. The data cover the date range from 1985 October 17 through 1986 December 12.   Processing Level Id : 3 Software Flag : N   Parameters : Data Set Parameter Name : PHOTOGRAPHIC DENSITY Data Set Parameter Unit : PIXEL   Description ----------- A logarithmic measure of the transmissivity (or reflectivity in the case of a photographic print) of a photograph. Generally, density : -lg (transmissivity), but offsets of the zero point, e.g., to correct for the losses at surface reflections, and multiplicative scaling are sometimes used. The transmissivity can be measured as diffuse (including all the light scattered over 2 pi steradians) or as specular (including only the light transmitted straight through the photograph within a narrow range of angles from perpendicular).  For the IHW LSPN data sets, specular density is used and the recorded value has been scaled by a multiplicative factor to increase the dynamic range.   Source Instrument Parameters : Instrument Host ID : SPEC Data Set Parameter Name : PHOTOGRAPHIC DENSITY Instrument Parameter Name : N/A Important Instrument Parameters : 0   Measurement Information :  Atmospheric Conditions ---------------------- N/A   Source ------ N/A   Calibration Standard -------------------- N/A   Wavelength Calibration ---------------------- N/A   Processing : N/A
DATA_SET_RELEASE_DATE 1992-09-30T00:00:00.000Z
START_TIME 1985-10-17T11:57:41.760Z
STOP_TIME 1986-12-12T05:44:09.600Z
MISSION_NAME INTERNATIONAL HALLEY WATCH
MISSION_START_DATE 1980-09-01T12:00:00.000Z
MISSION_STOP_DATE 1992-09-30T12:00:00.000Z
TARGET_NAME CERES
CAL LAMPS
DARK
SKY
COMET
HALLEY
EMISSION NEBULA
REFLECTION NEBULA
STAR
TARGET_TYPE ASTEROID
CALIBRATION
CALIBRATION
CALIBRATION
COMET
COMET
NEBULA
NEBULA
STAR
INSTRUMENT_HOST_ID SPEC
INSTRUMENT_NAME IHW SPECTROSCOPY AND SPECTROPHOTOMETRY
INSTRUMENT_ID SPEC
INSTRUMENT_TYPE SPECTROMETER
NODE_NAME Small Bodies
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE
Overview : N/A
CITATION_DESCRIPTION Wychoff S., and Wehinger P., IHW COMET HALLEY DIGITIZED PHOTOGRAPHIC SPECTRA V1.0, IHW-C-SPEC-3-DIDR-HALLEY-V1.0, NASA Planetary Data System, 1992.
ABSTRACT_TEXT NASA's International Halley Watch (IHW) has created a Comet Halley Archive. The collection of data spans the full wavelength range as submitted by scientists to the IHW. The observations belong to one of the following Disciplines: Amateur, Astrometry, Infrared Studies, Large-Scale Phenomena, Meteor Studies, Near-Nucleus Studies, Photometry and Polarimetry, Radio Studies, and Spectroscopy and Spectrophotometry. The data collected by these nine disciplines were augmented by Spacecraft measurements. The data were submitted to IHW, but the evaluation and selection for the Archive has been the primary responsibility of the Discipline Specialist Teams for each network in cooperation with the Lead Center. The Spectroscopy and Spectrophotometry Network collected 352 files that represented the digitized spectra from plate material. In some cases, the non-Halley targets for the spectroscopic observations can be grouped according to 'laboratory' calibration, dark, bias, flatfield, sky, and photometric standards. In the first category, a large number of 'arcs' and 'lamps' were used as follows: HE-NE, TH-AR, NE-AR, CU-AR, CU-NE, Thorium, Tungsten, Quartz, and Rubidium. For the 'sky' observers used the twilight, moonlight, and blank sky. The most common 'photometric' standards were stars, but observers also included other comets (Hartley-Goode), asteroids (Ceres), reflection nebulae (R8), and emission nebulae (NGC1982, NGC7000). A list of these stellar calibration targets follows: HD 140283, HD 184711, HD89688, HD102870, HD120086, HD13974, HD219188, HD 25680, HD 19445, HD18803, HD30455, HD26912, SAO 1280, HZ15, CD-22 7696, GD 190, GC5106, GC2188, GC2192, G19113213, G 99-37, L745-46A, Feige 15, Feige 56, Landolt 98, Landolt 92, Van Beuren, RHO ORION, CHI 1 ORION, 29 PI LEO. For this data, no distinction about 'reduction' is distinguished for this process. The data cover the date range from 1985 October 17 through 1986 December 12.
PRODUCER_FULL_NAME GRAYZECK, E.J., KLINGLESMITH, D.A., III, NIEDNER, M.B., JR
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