What is a critical aspect of using multiple DGPS units together?

In the context of using multiple Differential GPS (DGPS) units in conjunction, a critical aspect is indeed the need for different elevation masks to avoid position jumps. This requirement stems from the way DGPS systems receive signals from satellites. Each DGPS unit collects signals from multiple satellites, and the elevation mask determines which satellites are considered for positioning calculations.

By using different elevation masks, you can ensure that each DGPS unit is receiving data from a unique set of satellites. This strategy helps to avoid potential conflicts or discrepancies that could lead to position jumps. Position jumps occur when there is a sudden change in the calculated position that can arise from fluctuations or ambiguities in satellite signals. By carefully managing the elevation masks, you reduce the likelihood of receiving confusing or inaccurate signals that could affect the accuracy of your position calculations.

Effective management of elevation masks is particularly important in operational contexts like dynamic positioning, where reliable positioning data is crucial for maintaining a vessel's stability and movement. Therefore, this understanding of elevation masks is central to ensuring that multiple DGPS units operate optimally and cohesively without introducing errors.