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.
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.
MESSENGER MAG Calibrated Alternating Current Data Collection
Short Name:
MESS-MAG-CAL-LAC
Date:
06 Jan 2023 00:36:31
Publisher:
Planetary Data System
Description:
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.
MESSENGER MAG Calibrated J2000 Coordinates Science Data Collection
Short Name:
MESS-MAG-J2k
Date:
16 Dec 2022 17:28:24
Publisher:
Planetary Data System
Description:
Spacecraft position and calibrated 3-axis magnetic field samples in
J2000 coordinates. The data are tagged with latency corrected UTC and
MET time stamps. The J2K CDR is derived from the Science EDR.
MESSENGER MAG Calibrated MBF Coordiantes Science Data Collection
Short Name:
MESS-MAG-MBF
Date:
15 Dec 2022 19:30:45
Publisher:
Planetary Data System
Description:
Spacecraft position and calibrated 3-axis magnetic field samples in
Mercury body fixed coordinates. The data are tagged with latency
corrected UTC and MET time stamps. The MBF CDR is derived from the
Science EDR.
MESSENGER MAG Calibrated MSO Coordinates Science Data Collection
Short Name:
MESS-MAG-MSO
Date:
15 Dec 2022 19:29:30
Publisher:
Planetary Data System
Description:
Spacecraft position and calibrated 3-axis magnetic field samples in
Mercury Solar Orbital (MSO) coordinates. The data are tagged with
latency corrected UTC and MET time stamps. The MSO CDR is derived from
the Science EDR.
