ALDOT CORS (Alabama)

You will need to create a GNSS Contact.

• In case you need it, here is a link to the DOT where you can set up an account:
  1. http://aldotcors.dot.state.al.us/sbc/

1. In Trimble Access choose, Settings, Connections, GNSS Contacts.
2. You can either create a new GNSS Contact or copy and edit an existing:
   1. Name – ALDOT or whatever name you want.
   2. Contact type: Internet Rover
   3. Network Connection – Controller Internet
   4. Contact Type – Internet Rover
   5. Use NTRIP -Yes
   6. IP Address – 205.172.52.26
   7. IP Port – 10011
   8. Use proxy server – No      
   9. NTRIP username – (as you setup with ALDOT)
   10. NTRIP password - (as you setup with ALDOT)

You will need to create a Survey Style to run with Trimble Access on the RTN.

1. In Trimble Access under the Settings icon choose Survey Styles.
2. You can either create a new survey style or copy an existing survey style then edit the new copy as follows (be sure to rename the new style).  
   • Rover Options.

• Survey Type – RTK
• Broadcast format – Set to Multi Station (RTCM) (When you go to use this style and connect to ALDOT, choose the NEAR_MSM4 mountpoint.  
• Antenna type – Pick your antenna.  Access will also recognize what you are connected to.
• Measure to – Be careful to designate what you are measuring to.
• Antenna height – 6.562’ (2M)
• Serial number – not necessary
• Elevation mask – 10
• PDOP mask – 6.0
• GNSS Signal Tracking – check all constellations that your receiver can track

• Rover Data Link
  • Type: Internet Connection
  • GNSS Contact: Use profile created prior (ALDOT)
• Un-Check Prompt for GNSS Contact.