Cassini Magnetometer Raw Bundle - Errata This file describes any known errors or deficiencies in the data collections within this bundle. These data were originally archived in the folliwng PDS Data Set: CO-E/SW/J/S-MAG-2-REDR-RAW-DATA-V2.0 (https://doi.org/10.17189/1519599) These data sets were originally archived under PDS3 in the COMAG_0001 volume. During the migration from PDS3 to PDS4 the following issues were found. Cassini MAG Configuration Image Data Collection (urn:nasa:pds:cassini-mag-raw:data-hk-con-hkrate) =============================================================================================== The following products in the collection contain "Nan", infinity and negative infinity values. 99232_MRDCD_HKCONN 99230_MRDCD_HKCONN 00121_MRDCD_HKCONN 00120_MRDCD_HKCONN 08009_MRDCD_HKCONN 08007_MRDCD_HKCONN 08010_MRDCD_HKCONN 08005_MRDCD_HKCONN 08004_MRDCD_HKCONN 08008_MRDCD_HKCONN 08001_MRDCD_HKCONN 08002_MRDCD_HKCONN 08003_MRDCD_HKCONN 08006_MRDCD_HKCONN 07342_MRDCD_HKCONN 07315_MRDCD_HKCONN 07314_MRDCD_HKCONN 07339_MRDCD_HKCONN 07344_MRDCD_HKCONN 07343_MRDCD_HKCONN 07313_MRDCD_HKCONN 07312_MRDCD_HKCONN 07345_MRDCD_HKCONN 07317_MRDCD_HKCONN 07337_MRDCD_HKCONN 07365_MRDCD_HKCONN 07347_MRDCD_HKCONN 07310_MRDCD_HKCONN 07320_MRDCD_HKCONN 07340_MRDCD_HKCONN 07335_MRDCD_HKCONN 07287_MRDCD_HKCONN 07307_MRDCD_HKCONN 07308_MRDCD_HKCONN 07321_MRDCD_HKCONN 07334_MRDCD_HKCONN 07364_MRDCD_HKCONN 07288_MRDCD_HKCONN 07298_MRDCD_HKCONN 07358_MRDCD_HKCONN 07338_MRDCD_HKCONN 07291_MRDCD_HKCONN 07324_MRDCD_HKCONN 07304_MRDCD_HKCONN 07311_MRDCD_HKCONN 07318_MRDCD_HKCONN 07351_MRDCD_HKCONN 07361_MRDCD_HKCONN 07341_MRDCD_HKCONN 07331_MRDCD_HKCONN 07355_MRDCD_HKCONN 07302_MRDCD_HKCONN 07301_MRDCD_HKCONN 07327_MRDCD_HKCONN 07294_MRDCD_HKCONN 07328_MRDCD_HKCONN 07329_MRDCD_HKCONN 07293_MRDCD_HKCONN 07354_MRDCD_HKCONN 07353_MRDCD_HKCONN 07303_MRDCD_HKCONN 07292_MRDCD_HKCONN 07332_MRDCD_HKCONN 07325_MRDCD_HKCONN 07352_MRDCD_HKCONN 07305_MRDCD_HKCONN 07297_MRDCD_HKCONN 07290_MRDCD_HKCONN 07357_MRDCD_HKCONN 07330_MRDCD_HKCONN 07295_MRDCD_HKCONN 07360_MRDCD_HKCONN 07300_MRDCD_HKCONN 07350_MRDCD_HKCONN 07322_MRDCD_HKCONN 07362_MRDCD_HKCONN 07319_MRDCD_HKCONN 07289_MRDCD_HKCONN 07299_MRDCD_HKCONN 07359_MRDCD_HKCONN 07349_MRDCD_HKCONN 07309_MRDCD_HKCONN 07333_MRDCD_HKCONN 07363_MRDCD_HKCONN 07323_MRDCD_HKCONN 07296_MRDCD_HKCONN 07356_MRDCD_HKCONN 07336_MRDCD_HKCONN 07326_MRDCD_HKCONN 07316_MRDCD_HKCONN 07306_MRDCD_HKCONN Bundle Wide =============================================================================================== The time tag in the data files is provided in a non-standard form of the spacecraft clock (SCLK). The Cassini SCLK is usually represented as two numbers separated by full stop (.). The first number is the number of "seconds" since 1958 and the second number represents the number of 1/256 of a second between seconds. The MAG data records need to be timed to at least millisecond accuracy. Therefore, the second number in the spacecraft clock has been converted into milliseconds. In order to reproduce true spacecraft clock, multiply the second part of the SCLK by 256/1000 and round to the nearest integer. These data contain persistent noise signals at 0.2, 8, 16 Hz, and associated harmonics. This noise was not observed during ground testing of the instruments and is anticipated to be interference arising from the spacecraft. Removal of these signals is at the user's discretion. Data Coverage and Quality =============================================================================================== There are routine events that cause data quality problems so chronological listings of them have been included in the document-mag collection of the Cassini mission bundle: -calibration activities superimpose calibration data on top of science data and are documented in SCAS_TIMES.ASC (for more information on calibration activies refer to 'THE CASSINI MAGNETIC FIELD INVESTIGATION' by Dougherty et al in this collection) -data spikes may be seen at instrument range changes. Range changes are documented in RANGE_CHANGES.ASC -mode changes affect which sensors produce instrument data and spikes or rapid changes in data averaging may be seen at mode changes. The first few packets after the instrument is unmuted or after Science Packets recommence can be highly or incorrectly averaged. MODE_CHANGES.ASC lists the times of these events. -date corruption of the on-board memory (SSR) shown through spurious range changes lasting only one vector. The times of these corrupted vectors are listed in SPURIOUS_RANGE_CHANGES.ASC Data gaps may be instrument related (e.g. a sensor turning on/off) or mission related (e.g. telemetry downlink problems). The former are documented in MODE_CHANGES.ASC. All mission related gaps are listed in GAP_FILEs - GAP_FILE_SCI_HK.ASC for science data in the housekeeping packets and in GAP_FILE_SCI_SD.ASC for science data in the science packets. Instrument related gaps of less than one day also show up in the GAP_FILES as well as in MODE_CHANGES.ASC Most of the information in the GAP_FILEs are extracted from packets received reports and so follow a fixed-width tabular format. Multi-day gaps are not documented in the source listings and have been added manually with a different format including an explanation of the gap - if a reason is known. A more detailed description of the data gaps is included in the data collection descriptions text files. =============================================================================================== Users are encouraged to provide comments back to the PPI Node of the PDS if errors or omissions are found either in data or in documentation. Please send comments by e-mail to the PPI Node PDS Operator: Email pds_operator@igpp.ucla.edu