Differential GPS (DGPS) improves positioning accuracy over standalone GPS by:
Choose the correct answer
Using more satellite constellations
Using corrections from a fixed reference station at known location to remove common GPS errors
Adding more antennae to rover
Only works for horizontal measurements
Correct Answer
B. Using corrections from a fixed reference station at known location to remove common GPS errors
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
DGPS: a fixed reference station at known coordinates receives GPS signals and computes correction errors (due to atmospheric delay, ephemeris errors, clock bias). These corrections broadcast to roving receivers in real time. Accuracy improved from ±10–15 m (standalone) to ±1–3 m (DGPS) or < 0.1 m (RTK-GPS). Essential for precise engineering surveys.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.