Open Path Eddy Covariance System
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The datalogger programs are protected under U.S. and
International copyright laws. Do not distribute the datalogger
programs. See the End User License Agreement (EULA) shipped
with the programs for more information on your rights and
obligations.
Data is saved on the PC/CF card as a binary file in a Campbell Scientific, Inc.
format called Table Oriented Binary Format 3 (TOB3). TOB3 incorporates
features to improve reliability of the card and allows for the accurate
determination of each record’s time without the space required for individual
time stamps.
Use only SanDisk Industrial Grade or Silicon Systems
PC/CF Cards. Although consumer versions of PC/CF card
will fit into the card slot and operate, for a short time, only
the SanDisk Industrial Grade or Silicon Systems PC/CF
cards have passed our temperature and ESD testing.
Before the data can be used, it must be converted to a Table Oriented Binary
Format 1 (TOB1), Table Oriented ASCII Format 5 (TOA5), or Array
Compatible CSV file. In all of these formats, the time stamp is written to each
record. In the TOB1 format, the time stamp is reported as the number of
seconds and nanoseconds since 0000 hrs, 1 Jan 1990. In the TOA5 format, the
time stamp is a quoted string, similar to that used in Microsoft
®
Excel. In the
Array Compatible CSV, time is reported as elements of the array, e.g. in the
same format as the Campbell Scientific, Inc. mixed array dataloggers.
Campbell Scientific, Inc. recommends the use of TOB1 file
format. This file format can be readily read into third party post
processing software, e.g. EdiRe (“e-dE rE”), MatLab, or
DADiSP. If required, a TOB1 flux file can be converted into a
TOA5 flux file using CardConvert. A TOA5 file is comma
separated values and easily read into Microsoft
®
Excel as a CSV
file.
Both the TOB1 and TOA5 formats contain an ASCII header. This header
contains information about the datalogger used to collect the data. The header
also describes the data with variable names and units. For more information on
the file formats, see Section 2.4 in the datalogger manual.
For backwards compatibility with mixed array dataloggers, comma separated
values, without header information, is also supported with LoggerNet and
CardConvert. Elements that contain an array ID, day of year, hour and
minutes, can be added to the first few columns of the data file. This format is
supported in LoggerNet version 3.3 and CardConvert version 1.2 or greater.
4.1 Data Retrieval
Data can be collected from a datalogger using both LoggerNet and a direct
connection, or by physically moving the card from the datalogger to the
computer. Using LoggerNet and a PC as a data retrieval option is only
NOTE
CAUTION
NOTE