POP Module 3 - Site Selection

Deployment and Mobility

Master safe hitching procedures, site selection criteria, trailer deployment, relocation processes, and safety protocols

Learning Objectives

By the end of this module, you will be able to:

Safely hitch and unhitch the POP trailer to/from a tow vehicle
Select appropriate deployment sites based on line-of-sight and coverage requirements
Deploy stabilizing jacks and raise the telescopic mast
Execute relocation procedures when moving POPs between fields or centers
Follow safety protocols to prevent injury and equipment damage

Site Selection Criteria

Choosing optimal deployment locations for line-of-sight and coverage

 

Proper site selection is critical for POP performance. The location must provide clear line-of-sight to the main building's sector antenna while also covering the target area with WiFi access points.

 

Primary Criterion: Line-of-Sight to Hub

Definition: Line-of-sight (LOS) means a clear, unobstructed path between the POP's LiteBeam antenna and the sector antenna on the main ASC building. Even partial obstructions can severely degrade or prevent wireless connectivity.

How to Verify Line-of-Sight:

1. Visual Method: Stand at proposed POP location. Can you clearly see the building where the sector antenna is mounted? If yes, LOS is likely good.

2. Height Consideration: Remember the mast will be 21 feet tall when extended. Use a pole or ladder to approximate this height and verify visibility from that elevation.

3. Fresnel Zone: Wireless signals need clearance beyond just direct LOS. Ideally, 60% of the "Fresnel zone" (elliptical area around the direct path) should be clear. For practical purposes, ensure no obstacles within 10 feet vertically of the direct line.

4. Seasonal Changes: Consider tree foliage. A site with good LOS in winter may be blocked in summer when trees leaf out.

Good LOS Indicators:

  • ✓ Building clearly visible
  • ✓ No trees in direct path
  • ✓ Flat or gently rolling terrain
  • ✓ Distance <3 km (Ideal)

Poor LOS Indicators:

  • ✗ Building not visible
  • ✗ Trees/vegetation in path
  • ✗ Hills or terrain blocking view
  • ✗ Distance >5 km (marginal)

Secondary Criterion: Local Coverage Area

Goal: Position POP to provide WiFi coverage where it's needed—research plots, equipment sheds, work areas, sensor locations.

WiFi Coverage Expectations:

  • U6 Mesh Pro: ~185 m² (50m radius in open field)
  • E7 Campus: ~465 m² (80m radius in open field)
  • Coverage reduced by buildings, vegetation, terrain
  • 2.4 GHz band reaches farther than 5 GHz

Placement Strategy:

  • Position POP centrally within target area
  • Avoid placing behind metal buildings or dense structures
  • Consider adding second AP on opposite side of trailer for 360° coverage
  • Test coverage after deployment with mobile device

Additional Site Considerations

Ground Conditions:

  • Prefer firm, level ground for stability
  • Avoid areas prone to flooding or standing water
  • Soft soil may require boards under stabilizing jacks
  • Avoid steep slopes (≥5° can affect mast stability)

Solar Exposure:

  • Maximize southern exposure for solar panels
  • Avoid shading from trees, buildings, or mast itself
  • Consider seasonal sun angle changes
  • Full sun exposure is critical for reliable operation

Access and Security:

  • Ensure vehicle access for initial deployment and future service
  • Consider visibility from roads (security/theft deterrent)
  • Avoid high-traffic areas where trailer could be damaged
  • Coordinate with farm operations to avoid interference

Distance from Hub:

  • Ideal: <2 km (excellent signal, high bandwidth)
  • Good: 2-4 km (good signal, adequate bandwidth)
  • Acceptable: 4-5 km (marginal, requires perfect alignment)
  • Not recommended: >5 km (unreliable without repeater)

📋 Site Selection Checklist

Before Deployment:

Operational Factors:

Back Next
Previous Module Next Module