D4 Aerospace / RTK base station / R1 / Patent pending
RTK-1 — Survey-grade GNSS positioning that does not drop out
The RTK-1 is a rugged, five-constellation GNSS base station and NTRIP caster. It tracks five GNSS constellations, maintains RTK FIXED across three NTRIP casters with automatic failover, and records boundary surveys and field events directly on-board — all within one rugged field unit. It functions as both a precision GNSS receiver and an NTRIP caster. The MIL-STD-810H-hardened RTK-1M variant is available for demanding and contested environments. Made by D4 Aerospace. View the full site at rtk-1.com.
Variants
RTK-1 (Commercial)
Survey-grade GNSS base station and NTRIP caster for boundary and topographic survey, machine-control site setup, UAS ground control, and earth-science and geohazard monitoring. Sealed, tripod-mounted field enclosure. One base serves every rover and machine on the job.
RTK-1M (MIL-SPEC)
The RTK-1 platform in a CNC-machined aluminium, MIL-STD-810H-qualified enclosure, with an interference-rejecting anti-jam antenna available as an option for contested and degraded GNSS. Same five-constellation engine, triple correction failover and on-board logging. NDAA-compliant sourcing (Section 848 / 889). Export-controlled release.
Key capabilities
- Five GNSS constellations (GPS/QZSS, GLONASS, Galileo, BeiDou, NavIC), individually selectable per job.
- Triple NTRIP correction path (main plus two backups) with automatic failover — holds FIXED without operator input if a correction service drops.
- On-board survey files, point and event logging, with export — no laptop required in the field.
- Base station app for iOS and Android: live rover fix status, age of corrections, baseline and battery; caster health with automatic switchover; live boundary plotting; multi-camera support (CSI, USB, IP/RTSP, Bluetooth); persistent event and diagnostics logs.
- Upload your own basemaps — site plans, orthophotos, cadastral layers.
- Keep your data on your own site server, USB or SD card — no cloud account required.
- Comms: Wi-Fi, LTE and NTN (Non-Terrestrial Network); optional satellite upgrade for remote sites.
Where it works
Land survey, construction, UAS mapping, and geoscience monitoring.
Kits
Available as STAND-ALONE, FIELD KIT, FLEET KIT and SATELLITE KIT. In the box: RTK-1 base station unit, multi-band GNSS antenna and cable, USB-C power and data lead, the base station app for iOS and Android, and a quick-start card.
Specifications (RTK-1 / RTK-1M)
- Constellations: GPS/QZSS, GLONASS, Galileo, BeiDou, NavIC — individually selectable (both variants).
- Corrections: 3× NTRIP (main + 2 backup) with automatic failover (both variants).
- Mode: RTK base / static observation, survey grade.
- Logging: survey files, point and event logs, export from unit.
- Basemaps: upload your own — site plans, orthophotos, cadastral layers.
- Comms: Wi-Fi, LTE and NTN; optional satellite upgrade for remote areas.
- Data storage: your own site server, USB or SD card; no cloud account required.
- Antenna: multi-band GNSS survey antenna; anti-jam assembly optional on RTK-1M.
- Enclosure: sealed field enclosure (RTK-1); CNC-machined aluminium, MIL-STD-810H qualified (RTK-1M).
- Compliance: NDAA compliant — Section 848 / 889.
- Export status: standard commercial sale (RTK-1); export controlled, end use and destination screened (RTK-1M).
- Availability: waitlist and beta programme — first field units.
Availability & contact
Waitlist and beta programme are open ahead of first field units. Beta testers get field-test units first; waitlist members get first production. Defence enquiries are routed through export screening. No payment and no commitment at this stage. Contact: contact@rtk-1.com.
Continue to rtk-1.com