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John Deere OMPC20964 User Manual

Page 29

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GS2 Display—StarFire iTC

OUO6050,0002248

–19–14NOV06–3/4

Satellite Tracking Chart

• SAT ID – (Satellite Identification Number)

Identification number for GPS Satellite.

• ELV – (Position Elevation) Elevation in degrees

above horizon for GPS satellite position

• AZM – (Position Azimuth) Azimuth in degrees from

true North for GPS satellite

• L1 SNR – (L1 Signal to Noise Ratio) Signal strength

for L1 GPS signal (signal to noise ratio)

• L2 SNR – (L2 Signal to Noise Ratio) Signal strength

for L2 GPS signal (signal to noise ratio)

• Status – (GPS Signal Status) Status of GPS signal

– Search – searching for satellite signal
– Track – tracking satellite signal and using it for

positioning

– OK – tracking satellite signal and using it for

positioning

– OK SF1 – Tracking satellite signal and using it for

positioning with STARFIRE single frequency

– OK SF2 – Tracking satellite signal and using it for

positioning with STARFIRE dual frequency

Satellite Tracking Information

Satellite Tracking information is displayed at bottom of
SKY PLOT and GRAPH tabs.

• Satellites in Solution – number of satellites used to

compute position.

• Satellites Above Elevation Mask – total number of

GPS satellites available to receiver that are above 7
degree elevation mask.

• Satellites Tracked – total number of GPS satellites

tracked by receiver.

• Corrections Age (sec) – age of differential correction

signal to GPS (normally less than 10 seconds)

• VDOP – Vertical Dilution of Precision

• HDOP – Horizontal Dilution of Precision

• PDOP – Positional Dilution of Precision is an

indicator of GPS satellite geometry as viewed by
receiver. A lower PDOP indicates better satellite
geometry for calculating both horizontal and vertical
position.

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