GPS Antenna Cable | UNAVCO Facility

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GPS Receiver and Computer Installation

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Configurations GPS Receiver GPS Antenna GPS Antenna Cable GPS Antenna Monument Meteorological Package System Computer SuomiNet Network Rules University Cost-Share Equipment

Additional SuomiNet Information

* GST/SuomiNet Page * GPS Receiver and Antenna Testing Report for SuomiNet * Trimble SuomiNet Press Release * UNAVCO Support for SuomiNet, a GPS Network for Atmospheric Sensing * SuomiNet Efforts in the US Southern Great Plains * GPS Sensed Small Scale Water Vapor Variability in the Southern Great Plains * Impact of GPS-Based Water Vapor Fields on Mesoscale Model Forecasts

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Note - content is provided for historical continuity and may be out of date.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. More information...

SuomiNet | Procedure

Last modified Tuesday, 22-Nov-2005 22:44:00 UTC