GeoAstra BLE-GNSS iOS App – Connect Bluetooth RTK GNSS to iPhone & iPad (cm-level accruacy)

Turn iPhone or iPad into a Centimeter-Level RTK Field Solution

Pair GeoAstra BLE-GNSS with a compatible RTK receiver such as EX-1 or P-70 Ultra, then connect to a suitable CORS or NTRIP correction service. The app manages the Rover workflow and displays the receiver-supplied RTK position directly on iOS.

• Configure NTRIP Rover settings from iPhone or iPad
• Send RTCM corrections to supported receiver hardware
• Monitor RTK Float, RTK Fixed and live GNSS quality
• Use the corrected receiver position for collection and stakeout

A practical centimeter-level mobile workflow without a dedicated survey controller.

Deploy a Portable RTK Base and Your Own CORS Service

With supported Base-capable hardware, GeoAstra BLE-GNSS can configure Survey-in or fixed coordinates and upload RTCM corrections to an NTRIP caster. Pair it with the free GeoAstra NTRIP Caster to create a portable Base-to-CORS workflow whenever and wherever you need it.

• Configure supported hardware as an RTK Base from iOS
• Use Survey-in or known fixed coordinates, depending on the receiver
• Publish Base corrections over an available internet connection
• Provide Rover access without an NTRIP caster subscription fee

Portable RTK Base hardware, iOS control and a commercial-grade free caster service in one deployable workflow.

Connect at the Application Layer

Discover a supported BLE receiver, save it to the Device List and connect without treating the receiver as a replacement for the iOS location system.

• Scan for nearby compatible receivers
• Save and manage receiver entries
• Read receiver-supplied NMEA and positioning status
• Automatically reconnect after an unexpected Bluetooth interruption

See the Data That Matters

The live Dashboard brings receiver information into one clear iOS view for field monitoring.

• Fix status, coordinates and altitude
• Satellites, HDOP/VDOP and available hAcc/vAcc
• Speed, heading, message counters and map position
• GNSS and NTRIP logs for connection visibility

Projects and Point Collection

• Create and activate local projects
• Collect survey points with occupation averaging
• View live receiver position and map context
• Recover an interrupted collection with Finalize or Discard options

Track Recording

• Record tracks from the connected receiver stream
• Choose Raw Update Rate or time-based logging intervals
• Review recorded and rejected sample counts
• Keep collection data organized under the active project

RTK Rover

Configure a compatible receiver to obtain RTCM corrections from a CORS or NTRIP caster and monitor Float or Fixed status from the Dashboard.

• Enter caster host, port, mount point and credentials
• Send received RTCM corrections to supported receiver hardware
• Monitor correction and positioning status

RTK Base

Use supported receiver-specific Base workflows and upload generated RTCM to a configured caster.

• EX-1 Survey-in or fixed-coordinate workflow
• P-70 receiver-managed Survey-in or fixed coordinates
• NTRIP Server reconnection after qualifying unexpected connection loss

Review and Return to the Field

• Browse point and track details in My Data
• Play tracks in 2D, 3D or Altitude 3D views
• Import stakeout targets from supported file formats
• Navigate with north, east and height offsets using a connected Rover

Export and Share

• Export selections as CSV, GeoJSON, KML or GPX where applicable
• Export a complete project as GeoPackage
• Use the standard iOS Share Sheet to hand files to other apps
• Keep an unrounded project backup through GeoPackage export