Raw Message Definition
# From https://www.gpsinformation.org/dale/nmea.htm#GSA: GSV shows data about the satellites
# that the unit might be able to find based on its viewing mask and almanac data. It also shows current ability
# to track this data. Note that one GSV sentence only can provide data for up to 4 satellites and thus there may
# need to be 3 sentences for the full information. It is reasonable for the GSV sentence to contain more satellites
# than GGA might indicate since GSV may include satellites that are not used as part of the solution. It is not a
# requirment that the GSV sentences all appear in sequence.
# Number of messages for full data
# This message's number. The first message has number 1, last has number n_msgs.
# Number of satellites currently in view
# Up to 4 satellites can be described in each message
Compact Message Definition