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horizon to directly overhead, respectively. The azimuth is mapped on a compass relative to true
North. The colored rings indicate the lowest elevation cut-off angles at which satellites are
tracked and can be changed or viewed via the
Each of the satellites being tracked are represented with icons according to their satellite system
as follows:
There are also information icons and values at the bottom of the window:
The PRN of the satellite is displayed on the icon and color-coding is used to indicate the status of
the satellite or the tracking channel. Click on a satellite to display information on that satellite.
When a valid position has been achieved, dilution of precision (DOP) values can be viewed in the
DOP window.
Open this window by selecting Constellation Window from the View menu or by clicking
its button in the Window Toolbar.
•
Channel Tracking Status Window: The Channel Tracking Status window displays key
information for each of the receiver's processing channels, including the PRN of the satellite
being tracked by that channel, the Signal to Noise Ratio, Pseudorange measurements, Doppler
values, Residuals measurements and Lock Time from the satellite.
The TRACKSTAT log provides the data for many of the fields listed in this window. The number
of channels displayed depends on the model of your receiver and the bars are color-keyed to indi-
cate the frequency type on the channel.
from the View menu or by selecting the American and Russian flag buttons in the Window Tool-
bar.
•
Position Window: The Position window displays:
SMART-AG User Manual Rev 2
• Circular for GPS
• Square for GLONASS
• Hexagon for SBAS
• The number of GPS/GLONASS satellites used in the solution verses the number
being tracked. For example, 0/5 next to the Russian flag means that while the
receiver is tracking 5 GLONASS satellites, none are currently used in the position
solution.
• Satellite PRN number Azimuth and elevation angle values
• Signal to Noise Ratio (SNR) value and indicator
Open these windows by selecting Tracking Status Window GPS/GLONASS
• The receiver's latitude, longitude and height
• The Solution Type, also known as Position Type
• The solution or differential age (number of seconds the current solution has been
button.
Chapter 4
37
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