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Data Sets and Information
• bundle: Mars 2020 Mast Camera Zoom Bundle, from Operations Team, mosaic products
  Mosaic data products for the Mars 2020 Perseverance Rover Mast Camera Zoom Camera created by the operations team.
• bundle: MER1 Microscopic Imager Science Calibrated Data Bundle
  This bundle contains calibrated data from the Microscopic Imager (MI) on Mars Exploration Rover 1 (Opportunity). These data were produced by the science team.
• bundle: Whiteley NEO Photometry V1.0
  This data set includes the ECAS system (Eight Color Asteroid Survey) photometry and taxonomic types of 77 Near Earth Objects published by R.J. Whiteley in his thesis (Whiteley, 2001. A compositional and dynamical survey of the near-earth asteroids. Ph.D. thesis, University of Hawaii), [WHITELEY2001] The ECAS system is established in Zellner et al. 1985, Icarus 61, 355-416 [ZELLNERETAL1985]. The original ECAS survey is available in PDS as data set EAR-A-2CP-3-RDR-ECAS-V3.0. The data presented here are new measurements based on the ECAS system.
• bundle: Small Main-Belt Asteroid Spectroscopic Survey, Phase II V1.0
  This data set contains visible-wavelength (0.435-0.925 micron) spectra for 1341 main-belt asteroids observed during the second phase of the Small Main-belt Asteroid Spectroscopic Survey (SMASSII) between August 1993 and March 1999. The purpose of the SMASSII survey was to provide a new basis for studying the compositional diversity and structure of the asteroid belt. Based on experiences gained from the earlier SMASS survey, SMASSII focused on producing an even larger, internally consistent set of CCD spectra for small (D < 20 km) main-belt asteroids. The observing strategies and procedures used during SMASSII roughly parallel those used in the first survey (Xu et al. Icarus 115 1-35, 1995), though several minor changes were made in instrumentation and in portions of the data reduction process.
• bundle: The IRAS Mission Data Bundle
  The InfraRed Astronomical Satellite (IRAS) was launched on January 26, 1983 from Vandenburg Air Force Base in California. It was a joint program of the United States, the Netherlands, and the United Kingdom. The primary mission of IRAS was to conduct a sensitive and unbiased survey of the sky in four wavelength bands centered at 12, 25, 60, and 100 microns. It also made pointed observatons of selected astronomical and solar system objects. This bundle contains the PDS data holdings from the IRAS mission.
• bundle: Phoenix Mission Bundle
  This version of the Phoenix bundle was created by the PDS Atmospheres node in 2014
• bundle: Hayabusa2 Optical Navigation Camera (ONC) Bundle
  This bundle collects all the operational data products produced by Hayabusa2 Optical Navigation Camera (ONC).
• bundle: Asteroid Lightcurve Data Exchange Format (ALCDEF) Database V1.0
  The Asteroid Lightcurve Data Exchange Format (ALCDEF) database contains metadata and data produced by asteroid time-series photometry by amateurs and professionals and submitted to the database using a format that follows ALCDEF standards definition. There are three related data files: metadata, lightcurve data, and - optionally - comparison stars data. The ALCDEF structure is based on the concept of "lightcurve blocks." Each block contains two (optionally, three) sections: metadata, compstars (optional), and lcdata. Because of the very large number of observations (9944193) for 23847 distinct objects, there are multiple files for the metadata, compstars, and lcdata sections. Each compstars and lcdata file covers the same objects that are in a given metadata file. For example, if the metadata file covers objects numbered 1 to 100, then the corresponding compstars and lcdata files will contain data for those objects only. The ordering of the records in a metadata file is based on the object's number with its name used as the first tie-breaker for unnumbered objects, i.e., when number = 0. For lightcurve blocks of the same object, the SessionDateTime, in ascending order, provides the second tie-breaker. If necessary, the Filter is used for the third tie-breaker. There are 222 data files in the archive, which is comprised of sets of three files (metadata, compstars, and lcdata) with each set having the same base name. The metadata files are split by ObjectNumber into groups, each in its own subdirectory under the root\data directory, containing no more than 100 objects for those numbered between 1 and 999, not more than 1,000 for those numbered between 1,000 and 9,999, and no more than 10,000 for those numbers greater than 10,000. Unnumbered asteroids are grouped into a single file. N.B. Since compstars are not required, it's possible that an entire set of metadata records, e.g., 5400000-550000, will have no compstars at all. The current PDS4 standard does not allow for 0 records in a file so, in this case, a single record is added to the compstars-xxx-xxx.csv that gives the default for a missing entry, e.g., -9 for an integer and '-' for an empty string. Each record in an alcdef_metadata_XXX file includes, among others, the object number and/or name and/or designation, the mid-date (UT) of the data associated with the given lightcurve block, the person submitting the data, contact information for the submitter, equipment used, the filter and magnitude band (e.g., Johnson V) used for the observations, and any corrections applied to the original, raw data (e.g., reduction to unity distances or transformed to a photometric standard such as Johnson-Cousins or SDSS). Each record in an alcdef_lcdata_XXX file gives the JD and magnitude (magnitude error, optional) for a single observation (data point) along with an ID number that ties the observation to a specific metadata record. Each record in an alcdef_compstars_XXX file provides details on one of the comparison stars used during the observations along with an ID number that ties the comp star data to a specific metadata record. Each record includes, among others, the name, RA/DEC (J2000.0), magnitude, and - if used - the color index of each star. Up to 10 comp stars are allowed for each metadata record. The archive includes an alcdef_standard.pdf file that provides extensive details about the ALCDEF standard such as keywords, appropriate values, and cross-checks run during submission to avoid having incomplete data. For example, if the magnitudes have been reduced to unity distances, whether or not a fixed value (at mid-time) was used or point-by-point. The file includes bookmarks for easy navigation to specific sections. Caveats to the data user ======================== The data have been submitted without verification of accuracy. Unlike astrometry, where checks can be run to see if the reported position is reasonable against current orbital parameters, the ALCDEF data should be taken "as-is" and so it is up to the end user to determine which individual lightcurve blocks are suitable for his purposes. The ALCDEF standard and software used to generate ALCDEF files have evolved since the format was introduced in 2010. Therefore, a number of fields that would normally have data in a recent entry will have the default value for "missing" or NULL data. Also, when magnitudes are simple differentials, e.g., +0.758, early data entry did not provide for the zero point that led to the differential value and so the actual "sky magnitude" for the data point is unknown. Also of concern for early submissions is the naming of individual comp stars. Initially, the software often used by amateurs used the X/Y coordinates of the star on a reference image for the name. Afterwards, that software used the Right Ascension and Declination (J2000.0) for the name, e.g., "102310.58 +213512.6". This was preferred over using the number/name from the reference star catalog, which was often Zone:Number and not always fixed depending of the catalog and/or its version.
• bundle: LRO LROC Data Archive
  Un-calibrated data from Lunar Reconnaissance Orbiter Camera (LROC). This data set comprises Un-calibrated data from the LROC NAC and WAC cameras. The science data is comprised of Un-calibrated raw images, along with pointing data and housekeeping information.

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