Knowledge Base

SuomiNet - GPS Antenna Cable

Note - content is provided for historical continuity and may be out of date. The UNAVCO SuomiNet pages are not actively maintained, and up-to-date SuomiNet information should be obtained from UCAR’s COSMIC program at: www.cosmic.ucar.edu/suominet.html

The standard SuomiNet GPS system comes with a 30 meter antenna cable. This cable will be modified by UNAVCO to accomodate a lightning protector. Ideally, the lightning protector will be located immediately outside the receiver enclosure (typically a building). UNAVCO needs to know the cable length A, from the GPS receiver to the lightning protector, and cable length B, from the lightning protector to the GPS antenna (A + B = 30 meters).

For cable runs longer than 30m custom cables must be used. Obtaining these cables is the responsibility of the participant. The total cable loss can not exceed 12dB.

Andrew Corporation Heliax Cable and Connectors available from Hutton Communications Inc.:

Cable Length (1) Cable Male N-type Connector Cable Diameter Minimum Bend Radius
31m-52m LDF1-50 L1PNM-H 8.8mm 76mm
53m-61m LDF2-50 L2PNM-H 11mm 95mm
62-93m LDF4-50 L4PNM-H 16mm 125mm
94-162m LDF5-50A L5PNM-H 28mm 250mm

(1) Assumes lightning suppression and a 1m Lemo-N pigtail provided by UNAVCO.

GROUNDING DISCLAIMER: Lightning protector is typically graounded with 10 gauge or heavier bare copper wire clamped to an eight foot grounding rod driven in soil. This installation must be performed or approved by qualified facility personnel. Improper installation can cause damage to people and property.

Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
SuomiNet - GPS Antenna
Viewed 1990 times since Tue, Dec 29, 2009
SuomiNet - Meteorological Package Specifications
Viewed 5310 times since Fri, Sep 3, 2010
SuomiNet - GPS Antenna Monument
Viewed 4634 times since Wed, Dec 30, 2009
SuomiNet - System Computer
Viewed 1636 times since Tue, Dec 29, 2009
SuomiNet - Meteorological Package Purchase
Viewed 6026 times since Fri, Sep 3, 2010
SuomiNet - Meteorological Package Configuration
Viewed 4498 times since Tue, Dec 29, 2009
SuomiNet - GPS Receiver
Viewed 2107 times since Tue, Dec 29, 2009
SuomiNet - Computer and GPS Receiver Installation Instructions
Viewed 30362 times since Tue, Dec 29, 2009
SuomiNet - Cost-Share Information
Viewed 1897 times since Tue, Dec 29, 2009

Last modified: 2019-12-27  16:36:35  America/Denver