# Operating Modes

## Static Observation Mode

Primary function for establishing accurate survey points. Two workflow options:

### Pre-Survey Workflow

* Secure point before additional operations
* Use for drone mapping/rover shot baselines

### Post-Survey Workflow

* Begin operations immediately
* Determine point later via PPP
* Adjust previously acquired coordinates
  * Use [RoboDot](/robodot-touch-user-guide/robodot-utility-software.md) Utility with Image Offset Tool

## Post-Processing Workflow - Precise Point Positioning (PPP)

When collecting GCPs or surveying a point ahead of rover operations.

1. Collect minimum 2 hours of observations at control point
2. Submit rinex file \*\_opus.o to NOAA's OPUS with:
   * Antenna type: NONE
   * Height: Pole height + 0.094m to get the ground elevation

## Base Station Mode

RoboDot provides Real-Time Kinematic (RTK) positioning in two accuracy types:

### Relative Positioning

* High accuracy relative to base station
* Suited for local survey work
* Does not require absolute coordinates

### Absolute Positioning

* Requires known point coordinates
* Reference options:
  1. Pre-surveyed point
  2. Real-time corrections from:
     * Another positioned RoboDot
     * Virtual Reference Station (VRS)

## Rover Mode

Applications include:

* Ground control point marking
* Check shots
* Point surveying
* Geographical Information Systems

## Repeater Mode

Considerations

* Terrain and obstructions that may reduce effective range
* Testing range before critical operations is recommended

Applications include:

* Large area mapping
* Operations with line-of-sight limitations
* Operations that require multiple simultaneous rovers from a single source
  * Drone mapping while collecting GCPs


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