RTK Base Rover Setup for Different Survey Types

The Environment: Rural farmland, undeveloped greenfield sites, river catchments, and coastal mapping corridors typically offer excellent open-sky geometry with minimal obstruction. However, these environments also mean no cellular coverage, long baseline distances, and equipment that must function reliably far from any support infrastructure. A self-deployed base station is the only viable correction source in these conditions.

Recommended Configuration: Deploy any APEKS RTK receiver as a base station for sites within a 10 km working radius. For larger survey blocks — pipeline rights-of-way, mining concessions, or extensive cadastral projects — deploy the APEKS MAX5 base station. Its 5W LoRa radio pushes the reliable correction radius to 25 km without any relay equipment. The MAX5 internal 13,200 mAh battery sustains 8 hours of continuous broadcast, eliminating generator dependency entirely.

Field Operation Steps:

1. Select the highest accessible vantage point within the survey block. Elevated antenna placement is the single most impactful factor for maximising UHF propagation across broken topography. Even a 2-metre height advantage over surrounding terrain can double effective range in hilly conditions.
2. Allow 3–5 minutes of continuous autonomous position averaging before enabling transmission. In open terrain with clear sky, this produces a stable base coordinate accurate to approximately ±1–3 metres absolute — sufficient for projects requiring only local internal consistency. For absolute national grid accuracy, occupy a known benchmark and enter the surveyed coordinate manually.
3. Set the rover elevation mask to 10–15° and confirm all seven constellations are active in ApekSurv. The 1408-channel engine in APEKS receivers maintains PDOP below 3 across the survey area, ensuring rapid Fixed acquisition even at the maximum working distance from the base.
4. Mark the base occupation point permanently with a concrete nail or survey pin. Record the averaged base position in ApekSurv and photograph the setup with a scale reference. This allows confident re-occupation on subsequent field days, maintaining full coordinate consistency across multi-day mapping projects.

The Environment: Urban construction sites present a unique combination of dense cellular network coverage alongside severe multipath interference from steel-framed structures, glazed facades, parked machinery, and below-grade excavations. Physical base stations are a liability in active construction zones — they are routinely disturbed by site traffic, relocated by other contractors, or simply stolen. A CORS/NTRIP connection eliminates all of these risks entirely while delivering correction data from a permanently established reference network.

Recommended Configuration: APEKS AP30 Laser, AP40 Laser+, or AP60 Vision in CORS/NTRIP mode. All include built-in 4G modems with SIM slots and fully support the NTRIP protocol through ApekSurv. The AP40 Laser+ 120M green laser additionally allows measurements to inaccessible points — column bases, wall edges, and drainage channel inverts — without repositioning the pole into hazardous locations. The 120° calibration-free IMU allows pole measurements inside confined trenches and under scaffolding where levelling the pole is physically impractical.

Field Operation Steps:

1. Connect to CORS via ApekSurv → Data Link → NTRIP before entering the site. Confirm Fixed status and check differential age is below 3 seconds while you still have clear sky at the site perimeter. Walking deep into a construction site before confirming the data link is active wastes significant setup time.
2. Select the nearest CORS mountpoint. Urban CORS networks typically have reference stations every 20–40 km; using a distant mountpoint increases atmospheric decorrelation and degrades Fixed solution reliability. If your provider lists multiple options, always select the geographically closest one.
3. Verify the project coordinate system matches the CORS broadcast datum before recording the first stakeout point. In urban surveying, datum mismatches are the leading cause of costly rework — a WGS84/CGCS2000 confusion can shift all staked points by 1–3 metres, which is catastrophic for structural positioning.
4. When Fixed is slow to converge near reflective structures, move the pole 3–5 metres laterally. Small repositioning breaks the multipath geometry without requiring a full site relocation. Allow 2–3 minutes after repositioning for the receiver to reinitialise with clean signal paths before recording points.

The Environment: Open-pit mining operations, pipeline right-of-way surveys, hydroelectric dam construction, and remote road infrastructure projects share a common challenge: zero cellular coverage across the working area, combined with large survey extents — often 15–30 km across a single project block. These environments demand maximum radio range, maximum battery endurance, and hardware that requires zero infrastructure to operate. A standard 2W UHF receiver used as a base station will fail to cover the working area reliably. Only the MAX5 with 5W LoRa is engineered for this demand.

Recommended Configuration: APEKS MAX5 as a dedicated base station paired with AP40 Laser+ or AP60 Vision rovers. The MAX5 5W LoRa radio achieves 25 km reliable correction broadcast under line-of-sight conditions, covering most single-block mining concessions without relay equipment. The 13,200 mAh internal battery — expandable to 27,000 mAh with an optional battery bar — means the base can broadcast continuously for a full double shift without intervention. The 1.39-inch HD touchscreen allows base configuration and status monitoring directly on the unit without requiring a paired controller.

Field Operation Steps:

1. Position the MAX5 on the highest accessible point within the concession boundary — a ridge crest, a bermed spoil heap, or the roof of a site office building all provide effective radio propagation advantages. In open-pit mining, mounting the base on the pit rim rather than the pit floor can extend usable range by 40% or more.
2. Allow the MAX5 a full 5-minute autonomous averaging session before enabling LoRa transmission. In remote projects, the absolute position of the base determines the absolute accuracy of every dataset collected. If a known control monument exists within the concession, occupy it and enter the coordinate — this ties your entire survey to the national mining cadastre grid.
3. After establishing the base, conduct a radio range test by walking the rover to the furthest working area boundary before starting productive work. Confirm differential age stays below 3 seconds at the extremity. If range is marginal, reposition the base antenna higher rather than adjusting rover settings — antenna elevation is always the most effective range improvement lever.
4. For multi-day projects, record the MAX5 base occupation point with a permanent survey pin and photograph the setup from multiple angles. On subsequent days, re-occupy the identical physical point and re-enter the same base coordinates. This preserves full coordinate consistency across the entire project dataset without the time cost of re-running control traverses.

References

• RTCM Standard 10403.3 — Differential GNSS Services
• ISO 17123-8:2015 — Field Procedures for GNSS RTK
• APEKS AP40 Laser+ Technical Datasheet, 2026
• APEKS MAX5 Base Station Datasheet, 2026
• IGS Real-Time Service — igs.org/rts
• InaCORS BIG Indonesia — inacors.big.go.id

SET UP. CONNECT. FIXED — IN UNDER 5 MINUTES.

APEKS RTK receivers feature calibration-free 120° IMU, built-in 4G NTRIP, and global OTA firmware — no geo-fence lock, no domestic-only restrictions. Works in Indonesia, Saudi Arabia, Brazil, or wherever your survey takes you.