Vemco HR2, User Manual

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TEMP_STATS
TEMP_STATS records
contain summarized ambient temperature information calculated from
temperature samples from a receiver’s built-in temperature 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.
Ambient Min (m) Minimum ambient temperature during the stats Accumulation Period.
Ambient Max (m) Maximum ambient temperature during the stats Accumulation Period.
Ambient Mean (m) Mean ambient temperature during the stats Accumulation Period.
Sample Count Number of temperature samples collected during the Accumulation
Period, used to calculate Ambient 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