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7 Carrier Phase Data Collection
7.2.5 What Is a Block of Data?
When you start a file, the Asset Surveyor software starts to record
carrier phase measurements. Useful data is not stored as one
continuous stream, however, but as a series of ‘blocks’.
The beginning and end of each block is determined by the number of
available satellites. As soon as four (or more) satellites are available, a
new block begins. This block continues until lock is lost. When lock is
regained, a new block begins.
The Asset Surveyor software continues to create blocks of data
throughout the file. These blocks together constitute the measurement
data for the entire session.
Opening and reopening files
The files that you create in the Asset Surveyor software are
independent of each other, so carrier phase data collected in one is of
no use to another.
If you use the Asset Surveyor software to collect carrier phase data,
you need to collect sufficient data every time you open a file—this is
true whether you open a new file or reopen an existing one. Always
make sure that you collect sufficient data for each file.
166 TSC1 Asset Surveyor Operation Manual