Novatel OM-20000041 사용자 설명서
C
Commands Summary
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
93
ECUTOFF
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.
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.
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
Syntax:
Example:
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.
therefore being degraded.
ECUTOFF
angle
Syntax
Range Value
Description
Default
ECUTOFF
-
Command
angle
-90° to +90°
Value in degrees (relative to the horizon).
0