Search Results

1–7 of 7 results (0.003 seconds)

Data Sets and Information
• collection: MESSENGER MAG Raw Science Header Information Data Collection
  Captures the instrument state (health and mode) as reported by the science packet. This information only changes on packet boundaries so it is kept in a separate EDR, minimizing repetition of information. Each row in the Science Header EDR corresponds to the information extracted from one science packet.
• collection: MESSENGER MAG Burst Science Log Data Collection
  A cumulative file for the entire mission. The purpose of the file is to keep a time log of bursts recorded by the instrument, as well as the number of burst packets recorded for each Burst EDR.
• collection: MESSENGER MAG Low-Rate Housekeeping Information Data Collection
  This collection contains tables of instrument state as reported by the MAG Low-Rate Housekeeping (LRHK) packet. It includes the 3-axis field values (received from the filter and subsampling logic) and the corresponding AC values.
• collection: MESSENGER MAG Calibrated Alternating Current Data Collection
  Ancillary MAG data containing calibrated alternating current (AC) values of the average output amplitude a 1-to-10 Hz bandpass filter for a single magnetometer axis selected by command.
• collection: MESSENGER MAG Low-Rate Header Information Data Collection
  MAG instrument state (health and mode) as reported by the LRHK packet. This changes only on packet boundaries so it is kept in a separate EDR, minimizing repetition of information. Each row in the LHRK Header EDR corresponds to information extracted from one LHRK packet.
• collection: MESSENGER MAG Status Information Data Collection
  MAG instrument raw status information, temperatures, voltage, command status counts as well as low-resolution (14-bit) 3-axis magnetic field samples as recorded by A/D converters integral to the Low Voltage Power Supply (LVPS).
• collection: MESSENGER MAG Alternating Current Data Collection
  Contains alternating current (AC) level values at the commanded sample rate. To conserve telemetry the vector sampling will usually be less than the maximum rate, 20 sample/s. To provide a record of the amplitude of fluctuations for frequencies higher than 1 Hz, an AC amplitude is calculated from the internally sampled 20/s data for the sensor axis commanded as the AC_AXIS. Thus, in addition to the vector samples data, a 1 Hz to 10 Hz bandpass average amplitude is evaluated for the commanded sensor axis, selected by command, and recorded as a log AC value with a 4-bit mantissa of the four most significant non-zero bits and a 4-bit power of two exponent of the 4th (least significant) bit of the mantissa. This is called the logAC value. It is created once per second and saved for telemetry at that rate or at the commanded science rate, whichever is less frequent.