It can not be said that any of the methods is better than the other, it all depends on your specific situation and the equipment that you use. Consider the main methods of data delivery for RTK connections and compare their strengths and weaknesses.


UHF radio

Pros:

  1. Does not require an Internet connection and can work outside the coverage area of cellular networks.
  2. Several rover receivers can be connected to the base station simultaneously.
  3. Using an external 35 watt radio modem, such as the Trimble HPB450, you can achieve a range of about 25 km.
  4. Many receivers have a built-in radio modem.

Cons:

  1. The range with the built-in radio modem is limited to 2 km.
  2. External modems require a separate battery.
  3. Strong communication requires direct visibility.
  4. Powerful radio transmitters require a license in many countries around the world.
  5. High cost of external modems.
  6. Low bandwidth of the channel, it may not allow the transfer of all data received by the database.

GSM modem

Pros:

  1. Unlimited range of communication.
  2. Many receivers have a built-in GSM modem.
  3. External modems are relatively inexpensive.

Cons:

  1. Work only in the coverage area of GSM networks.
  2. Provide only a point-to-point connection.
  3. Low bandwidth of the channel, it may not allow the transfer of all data received by the database.
  4. The fee for data transmission over the voice channel is significantly higher than the cost of data transmission.
  5. Obsolete technology from which mobile operators start to refuse.