SSC JE Civil (Paper 2) 4 Dec 2023 Shift 1 Solved Paper

Study the following pairs (P, Q, R, S) with respect to GPS receivers used in GPS surveys and select the correct answer based on the matching.
P : GPS receivers : L-band radio processor
Q : Self-contained GPS receivers : Also known as 'GPS mice'
R : Dual-frequency receivers : Survey grade GPS, position accuracy according to differential correction within sub-centimetre
S : Carrier phase receivers : GPS receivers with 10 to 30 cm position accuracy with differential correction