One of the major blunders that resulted in GNSS observation mistakes is to misread the antenna height. At least _______ members of the team shall be assigned to measure the antenna height separately.

Prepare for the DMC Administrative Order Test No. 2007-29. Use flashcards, interactive quizzes, and detailed explanations for each question to enhance your understanding. Master the content with our comprehensive practice material and succeed!

Redundancy through independent verification helps catch human error in field measurements. Antenna height directly affects GNSS height calculations and the associated processing; if one person reads the height, a misreading or transcription mistake can bias the results. Having at least a pair of team members measure the height separately creates an internal cross-check: two independent readings can be compared, discrepancies investigated, and the correct height confirmed before data are used. This approach improves reliability, provides an audit trail, and supports quality control in GNSS observations.