© Valeport Limited 2003
MIDAS Surveyor Operating Manual
Page 36
0420805d.doc
ID
DATA TYPE
STRING COMPOSITION
PP
Logging Paused
Ident No
Time of Pause
CC
Logging Continued
Ident No
Time of Continue
SV
Sound Velocity Data
Ident No
Sound Velocity currently applied to echosounder
Latest Sound Velocity reading (mm/s)
TI
Tide Data
Ident No.
Latest Tide Data Input (cm)
AX
Auxiliary input data
Ident No
Number of characters in string (padded to even number)
Data string
FX
Fix Mark
Ident No
Fix Mark Sequence Number
5.6.2
DISCARDING ERRONEOUS DEPTH DATA
It is a fact of hydrographic surveying that occasional spurious data points will be encountered from false echoes.
SurveyLog allows such points to be ignored in Valeport and XYZ files. Simply set the lower and upper limits for valid
data points before clicking on either the “View Translated VAL File” or the “View Translated XYZ file” buttons. In the
example screen shown under Section 5.6, points below 0.0 and above 100.0m depth will be ignored.
5.6.3
VALEPORT FORMAT FILES
To view a Valeport format file, which allows Time Series Data and Plots, click the “View Translated VAL File” button.
Highlight the required file when asked. Data may be viewed in either a list (notebook) type format or graphically. When
the file is opened, the following screen appears, listing out all the possible data line types (as described under the ASCII
file formats, Section 5.6.1.1). Only the selected data types will be opened from the chosen file (if available).
