Campbell Scientific CR3000 Micrologger - Manual (Page 416)

Section 8. Operation
416
8.8.7 Configure Display
Figure 132: Configure display
8.9 Program and OS File Compression
Q: What is Gzip?
A: Gzip is the GNU zip archive file format. This file format and the algorithms
used to create it are open source and free to use for any purpose. Files with the .gz
extension have been passed through these data compression algorithms to make
them smaller. For more information, go to www.gnu.org.
Q: Is there a difference between Gzip and zip?
A: While similar, Gzip and zip use different file compression formats and
algorithms. Only program files and OSs compressed with Gzip are compatible
with the CR3000.
Q: Why compress a program or operating system before sending it to a CR3000
datalogger?
A: Compressing a file has the potential of significantly reducing its size. Actual
reduction depends primarily on the number and proximity of redundant blocks of
information in the file. A reduction in file size means fewer bytes are transferred
when sending a file to a datalogger. Compression can reduce transfer times
significantly over slow or high-latency links, and can reduce line charges when
utilizing pay-by-the-byte data plans. Compression is of particular benefit when
transmitting programs or OSs over low-baud rate terrestrial radio, satellite, or
restricted cellular-data plans.