Rtk Gps

RTK GPS Shot Accuracy?

Which option would give more accurate results?

1. The average of two RTK GPS shots on the same point separated by 30 seconds.

2. The average of two RTK GPS shots on the same point separated by 2 hours.

Pleas, explain.

If you have a good RTK system then it shouldn't make much difference.
2 hours will in theory be a little better since the satellite constellation will have changed, that means that constellation dependent errors will be different and so average out more than for two points taken 30 seconds apart when those errors will be very similar.

Of course it depends when you take the points, ionospheric effects get worse in the evening, constellation geometry is constantly changing and has a huge impact on accuracy etc... So if the conditions are worse 2 hours later then the increased error due to other factors could well be more than the decrease in error due to taking the two points further apart.

And if accuracy is really that important then you wouldn't be taking two points 30 seconds or 2 hours apart. You'd be taking a point every second for at least 40 minutes and averaging.

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TOPCON Hiper Ga GPS ROVER RTK 410 470 Mhz FC 2000 Data Collector Ver 420
TOPCON Hiper Ga GPS ROVER RTK 410 470 Mhz FC 2000 Data Collector Ver 420
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SATEL 2AS3AS RADIO ANTENNA ROBOTICRTK GPSTOPCONSOKKIALEICASURVEYING
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Seco Surveying 5114 20 GPS Truck Door Bracket RTK Topcon LeicaTrimble
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TRIMBLE 4700 4800 RTK GPS SYSTEM SURVEYING
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Topcon GR 3 GPS GLONASS L1 L2 RTK Base Or Rover Receiver UHF 410 470 MHz GR 3
Topcon GR 3 GPS GLONASS L1 L2 RTK Base Or Rover Receiver UHF 410 470 MHz GR 3
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Replacement Serial RS 232 to 7 pin Data Cable for Topcon GPS RTK SURVEYING
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New Yellow GPS host bag Single shoulder bag for Trimble Topcon Sokkia GPS RTK
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Trimble GPS Receiver 4700 W internal radio surveying TSC1 TSCE RTK 450 460 MHz
Trimble GPS Receiver 4700 W internal radio surveying TSC1 TSCE RTK 450 460 MHz
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TRIMBLE GPS ROBOTIC CU W 24GHZ RADIOTOTAL STATIONRTKSURVEYINGDATA COLLECTOR
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NEW 5M GPS RTK GNSS antennaTNC TNC cable RTK GNSS antenna FOR Trimble leica
NEW 5M GPS RTK GNSS antennaTNC TNC cable RTK GNSS antenna FOR Trimble leica
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Trimble R10 L1 L2 L2c L5 GPS Glonass GNSS Galileo Compass xFill TSC3 RTK R8
Trimble R10 L1 L2 L2c L5 GPS Glonass GNSS Galileo Compass xFill TSC3 RTK R8
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Intuicom RTK Bridge C3 Transceiver for GPS Base Station Replacement Network RTK
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Trimble CAT MS992 Smart Antenna GPS GNSS RTK GCS900 CCS900
Trimble CAT MS992 Smart Antenna GPS GNSS RTK GCS900 CCS900
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Trimble CAT Zephyr 2 Rugged Rover Antenna GPS GNSS RTK
Trimble CAT Zephyr 2 Rugged Rover Antenna GPS GNSS RTK
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NEW Stainless steel 30mm High GPS RTK Adapter Prism Adapter 5 8 x 11 thread
NEW Stainless steel 30mm High GPS RTK Adapter Prism Adapter 5 8 x 11 thread
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Geosun eFix R1 Trimble board GPS RTK GNSS good price
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NEW TRIMBLE GPS Heavy Duty Power Cable for Trimble RTK R6 R8 R7 4700 4800 GPS
NEW TRIMBLE GPS Heavy Duty Power Cable for Trimble RTK R6 R8 R7 4700 4800 GPS
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New GPS Carrier With Lock  Green Tribrach With Optical Plummet For GPS GPS RTK
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Power Cable for Trimble 57005800 Total StationsR6R7R8 GPS RTK
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Topcon Sokkia GPS Antenna GR 3 GR 5 Hiper II GRX1 GRX2 Surveying RTK
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Dutch Hill Tribrach with optical plummet for GPS RTK Trimble Topcon Leica Sokkia
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Topcon Hiper V RTK GPS Dual GD Digital UHFII 440 470 Base  Rover GloNass System
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SATEL RADIO MODEM BATTERY CHARGER ROBOTICRTK GPSTOPCONSOKKIALEICA2AS3AS
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NEW GPS RTK Antenna sucker for leica trimble topcon total stations
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New South S730 controller battery For South Survey equipment RTK GNSS GPS
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Trimble R6 Model 1 GNSS GPS L1 L2 RTK 450 470mhz TSC2 TDL 450H 5800 R10 R8
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Trimble R6 Model 1 GNSS GPS L1 L2 RTK 450 470mhz TSC2 Rover
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BMG 80 RTK Basase station or rover GPS GNSS NEW
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Replacement Charger of CL15000 Charges Extensional Battery of RTK GPS Poles
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