Merge pull request #55 from fixposition/fix/nmea-sampling

Added note to the README

README.md

@@ -176,7 +176,7 @@ The output is published on the following:
     | `/fixposition/gnss1` | `sensor_msgs/NavSatFix` | as configured on web-interface | Latitude, Longitude and Height |
     | `/fixposition/gnss2` | `sensor_msgs/NavSatFix` | as configured on web-interface | Latitude, Longitude and Height |
 
--   From **NMEA-GP-GGA_GNSS**, **NMEA-GP-RMC_GNSS**, and **NMEA-GP-ZDA_GNSS**, at the configured frequency (default 5Hz): The Vision-RTK2 can also output an average GNSS-based LLH position (i.e., **only GNSS, not Fusion**) and heading estimate based on speed over ground (**SOG**) and course over ground (**COG**) - (i.e., **the platform must be moving for it to be accurate**) by utilizing several NMEA messages, which serves as an auxiliary output until Fusion is fully initialized. This message's output frequency equals the lowest frequency of any of these three message types. **Note: This output should only be used until Fusion is fully initialized.**
+-   From **NMEA-GP-GGA_GNSS**, **NMEA-GP-RMC_GNSS**, and **NMEA-GP-ZDA_GNSS**, at the configured frequency (default 5Hz): The Vision-RTK2 can also output an average GNSS-based LLH position (i.e., **only GNSS, not Fusion**) and heading estimate based on speed over ground (**SOG**) and course over ground (**COG**) - (i.e., **the platform must be moving for it to be accurate**) by utilizing several NMEA messages, which serves as an auxiliary output until Fusion is fully initialized. This message's output frequency equals the lowest frequency of any of these three message types. **Note: This output should only be used until Fusion is fully initialized.** Warning: This topic will only be populated when the sampling rate of all required NMEA messages is 1 (i.e., the default output frequency of the messages).
 
     | Topic                | Message Type            | Frequency                      | Description                    |
     | -------------------- | ----------------------- | ------------------------------ | ------------------------------ |

fixposition_driver_ros1/README.md

@@ -134,7 +134,7 @@ The output is published on the following:
     | `/fixposition/gnss1` | `sensor_msgs/NavSatFix` | as configured on web-interface | Latitude, Longitude and Height |
     | `/fixposition/gnss2` | `sensor_msgs/NavSatFix` | as configured on web-interface | Latitude, Longitude and Height |
 
--   From **NMEA-GP-GGA_GNSS**, **NMEA-GP-RMC_GNSS**, and **NMEA-GP-ZDA_GNSS**, at the configured frequency (default 5Hz): The Vision-RTK2 can also output an average GNSS-based LLH position (i.e., **only GNSS, not Fusion**) and heading estimate based on speed over ground (**SOG**) and course over ground (**COG**) - (i.e., **the platform must be moving for it to be accurate**) by utilizing several NMEA messages, which serves as an auxiliary output until Fusion is fully initialized. This message's output frequency equals the lowest frequency of any of these three message types. **Note: This output should only be used until Fusion is fully initialized.**
+-   From **NMEA-GP-GGA_GNSS**, **NMEA-GP-RMC_GNSS**, and **NMEA-GP-ZDA_GNSS**, at the configured frequency (default 5Hz): The Vision-RTK2 can also output an average GNSS-based LLH position (i.e., **only GNSS, not Fusion**) and heading estimate based on speed over ground (**SOG**) and course over ground (**COG**) - (i.e., **the platform must be moving for it to be accurate**) by utilizing several NMEA messages, which serves as an auxiliary output until Fusion is fully initialized. This message's output frequency equals the lowest frequency of any of these three message types. **Note: This output should only be used until Fusion is fully initialized.** Warning: This topic will only be populated when the sampling rate of all required NMEA messages is 1 (i.e., the default output frequency of the messages).
 
     | Topic                | Message Type            | Frequency                      | Description                    |
     | -------------------- | ----------------------- | ------------------------------ | ------------------------------ |

fixposition_driver_ros2/README.md

@@ -134,7 +134,7 @@ The output is published on the following:
     | `/fixposition/gnss1` | `sensor_msgs/NavSatFix` | as configured on web-interface | Latitude, Longitude and Height |
     | `/fixposition/gnss2` | `sensor_msgs/NavSatFix` | as configured on web-interface | Latitude, Longitude and Height |
 
--   From **NMEA-GP-GGA_GNSS**, **NMEA-GP-RMC_GNSS**, and **NMEA-GP-ZDA_GNSS**, at the configured frequency (default 5Hz): The Vision-RTK2 can also output an average GNSS-based LLH position (i.e., **only GNSS, not Fusion**) and heading estimate based on speed over ground (**SOG**) and course over ground (**COG**) - (i.e., **the platform must be moving for it to be accurate**) by utilizing several NMEA messages, which serves as an auxiliary output until Fusion is fully initialized. This message's output frequency equals the lowest frequency of any of these three message types. **Note: This output should only be used until Fusion is fully initialized.**
+-   From **NMEA-GP-GGA_GNSS**, **NMEA-GP-RMC_GNSS**, and **NMEA-GP-ZDA_GNSS**, at the configured frequency (default 5Hz): The Vision-RTK2 can also output an average GNSS-based LLH position (i.e., **only GNSS, not Fusion**) and heading estimate based on speed over ground (**SOG**) and course over ground (**COG**) - (i.e., **the platform must be moving for it to be accurate**) by utilizing several NMEA messages, which serves as an auxiliary output until Fusion is fully initialized. This message's output frequency equals the lowest frequency of any of these three message types. **Note: This output should only be used until Fusion is fully initialized.** Warning: This topic will only be populated when the sampling rate of all required NMEA messages is 1 (i.e., the default output frequency of the messages).
 
     | Topic                | Message Type            | Frequency                      | Description                    |
     | -------------------- | ----------------------- | ------------------------------ | ------------------------------ |