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C 

Commands Summary

MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

93

This command sets the elevation cut-off angle for usable satellites. The GPSCard will not start tracking a satellite
until it rises above the cutoff angle. If there are six or less satellites being tracked and one drops below this angle,
it will continue to be tracked until the signal is lost. However, if there are more than six satellites being tracked,
any that are below the cutoff angle will be dropped completely.

In either case, satellites below the ECUTOFF angle will be eliminated from the internal position and clock offset
solution computations only.

This command permits a negative cut-off angle; it could be used in these situations:

•

the antenna is at a high altitude, and thus can look below the local horizon

•

satellites are visible below the horizon due to atmospheric refraction

ecutoff 5

NOTE 1: When 

ECUTOFF

 is set to zero (0), the receiver will track all 

SV

s in view including some within a few

degrees below the horizon.

NOTE 2: Care must be taken when using 

ECUTOFF

 because the information you are tracking from lower elevation

satellite signals are going through more atmosphere, for example ionospheric and tropospheric, and
therefore being degraded.

ECUTOFF

angle

ECUTOFF

-

Command

angle

-90° to +90°

Value in degrees (relative to the horizon).

0