Fixposition Documentation
Fixposition Documentation
Breadcrumbs

HX-CH7604A

Setup

sensor.jpeg
Fig. 1: VRTK2 with HX-CH7604A
antenna.jpeg
Fig. 2: CH7604A antenna

Antenna phase center:

image-20240517-114301.png

Test results

Stationary 1

In this test the HX-CH7604A antenna was connected to GNSS2.

image-20240517-115412.png
Number of tracked signals
image-20240517-115507.png
Position variance
image-20240517-115528.png
CN0 timeseries
image-20240517-115555.png
CN0 histogram
image-20240517-115623.png
ENU position estimate statistics

Timeseries file:

antennas1-ch7604a.html

Link to KML file: 2024-05-16-12-40-56

Links to raw GNSS data: GNSS1, GNSS2

Stationary 2

In this test the HX-CH7604A antenna was connected to GNSS1.

image-20240517-115800.png
Number of tracked signals
image-20240517-120054.png
Position variance
image-20240517-115859.png
CN0 timeseries
image-20240517-115919.png
CN0 histogram
image-20240517-115954.png
ENU position estimate statistics

Timeseries file:

antennas2-ch7604a.html

Link to KML file: 2024-05-16-13-10-29

Links to raw GNSS data: GNSS1, GNSS2

Urban canyon
image-20240517-121107.png
Number of tracked signals
image-20240517-121132.png
Fix types
image-20240517-121155.png
Position variance
image-20240517-121218.png
CN0 timeseries
image-20240517-121239.png
CN0 histogram
image-20240517-124514.png
CN0 vs elevation
image-20240517-121306.png
ENU position estimate statistics

Timeseries file:

antennas3-ch7604a.html

Link to KML file: 2024-05-17-08-46-07

Links to raw GNSS data: GNSS1, GNSS2

GNSS outage
image-20240517-121602.png
Number of tracked signals
image-20240517-121631.png
Fix types
image-20240517-121654.png
Position variance
image-20240517-121711.png
CN0 timeseries
image-20240517-121731.png
CN0 histogram
image-20240517-124430.png
CN0 vs elevation
image-20240517-121805.png
ENU position estimate statistics

Timeseries file:

antennas4-ch7604a.html

Link to KML file: 2024-05-17-08-56-49

Links to raw GNSS data: GNSS1, GNSS2

Observations

  • This antenna presents a significantly better stationary performance compared to the AH-3232.

  • This antenna appears to reject some signals at low elevations, which could help with multi-pathing.

  • The time to re-fix was faster in some scenarios.

  • The average C/N0 was slightly lower when moving next to trees, which could be due to the signals rejected at low elevations.

Conclusions

  • This antenna can serve as a replacement to the AH-3232 antenna.

  • Has good performance in all scenarios.