PPK-Grade Survey Accuracy Without a Base Station: The Makeflyeasy PixPilot V3 and 8T PPK System
Survey-grade mapping used to mean carrying a ground control kit, occupying a base station, and waiting for a radio link to stay alive long enough to collect a fix. For teams running large-area photogrammetry and LiDAR campaigns with fixed-wing and VTOL platforms, that overhead eats directly into the day. Post-processed kinematic (PPK) positioning removes the live link requirement entirely, and it is exactly what the Makeflyeasy PixPilot V3 flight controller and the Makeflyeasy 8T PPK system are built to deliver.
Why PPK beats RTK for survey fleets
Real-time kinematic (RTK) correction needs a continuous connection between the aircraft and a base or an NTRIP service. Lose the link mid-line and the accuracy of that strip degrades. PPK inverts the workflow: the rover logs raw GNSS observations during the flight and corrections are applied afterward, using base data collected in parallel or downloaded from a CORS network. The result is centimeter-level accuracy with no dependency on a live radio hop, which matters enormously when flying beyond line of sight or in terrain where a base link is unreliable.
The PixPilot V3 is the autopilot that ties this together. It runs the ArduPilot ecosystem, so it integrates directly with the planning, geotagging, and post-processing tooling that mapping teams already use, and it exposes the hot-shoe and event-log timing needed to geotag every camera trigger accurately.
The 8T PPK unit: dual-constellation logging
The 8T PPK system is a compact multi-GNSS logger that records raw observations for post-processing against a base file. Because it logs independently of the telemetry link, a single operator can run a full mapping sortie without a second person babysitting a base station or a network correction feed. For integrators building survey aircraft, the 8T slots into the same footprint-conscious build philosophy as the PixPilot, keeping weight and wiring to a minimum on a fixed-wing or VTOL airframe.
What the pairing unlocks in the field
Combined, the PixPilot V3 and 8T PPK give a mapping platform three concrete advantages. First, the mission does not stall if the base link drops, because nothing is being corrected in real time. Second, the processing chain is deterministic: the same raw log, re-processed, returns the same answer, which matters for repeatable deliverables to a client. Third, the setup reduces field crew to a single pilot, since the base can be a permanent CORS station or a logged reference point rather than a live radio.
For operators who bill by the hectare, those are the same dollars: more acres surveyed per day, fewer re-flights from failed RTK fixes, and cleaner geotags through to the orthomosaic.
Choosing the right build
If your fleet is moving to centimeter-grade mapping, the PixPilot V3 is the flight-control foundation and the 8T PPK is the logging layer that makes the accuracy real. Both are designed for the industrial fixed-wing and VTOL class rather than hobby builds, so they pair well with the survey airframes and payloads a professional integrator already runs. Starting the upgrade at the autopilot and GNSS layer is the highest-leverage change you can make to a mapping aircraft, because every downstream deliverable inherits its quality.