Vemco HR2, Руководство пользователя

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NOISE_STATS_VR2Tx
NOISE_STATS_VR2Tx records
contain summarized noise information calculated from noise
samples (see DIAG_VR2Tx record) from a receiver’s built-in noise sensor (if applicable). They are
generated according to the stats logging interval selected in VUE’s
Logging Options window.
Field Description
Device Time (UTC) UTC date and time of the data according to the receiver’s clock (the
uncorrected time).
Time Date and time of the data following correction for receiver clock drift
(the corrected time
1
). The time offset of this time from UTC is indic-
ated in the “Time Offset (h)” column.
Time Offset (h) Offset from UTC time, in hours, of the value in the “Time” column. The
time offset is as selected when the receiver log was exported to Fathom
CSV format using the Fathom software.
Time Correction (s) The difference between uncorrected (“Device Time (UTC)”) and cor-
rected (“Time”) times.
Model Receiver model that generated the data in this record.
Serial Number Serial number of the receiver that generated the data in this record.
Noise Min (mV) Minimum noise during the stats Accumulation Period.
Noise Max (mV) Maximum noise during the stats Accumulation Period.
Noise Mean (mV) Mean noise during the stats Accumulation Period.
Sample Count Number of noise samples collected during the Accumulation Period,
used to calculate Noise Mean. To calculate raw data sampling interval,
divide Accumulation Period by Sample Count.
Accumulation Period
(s)
Period of time, in seconds, over which depth samples were collected and
stats calculated.
1
Upon export to CSV format, all data records are automatically corrected for receiver clock drift by the Fathom software. Fathom
uses the difference between your receiver’s clock and the UTC time calculated from your PC clock at offload to calculate corrected
times for each record in the receiver log. If the receiver clock was also adjusted during deployment (for example, using an external
device to periodically send time corrections to a cabled receiver), then these adjustments are also used in the calculation of corrected
times.
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6.2 Exporting Data