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Table 3 Horizontal gradient of sound speed estimated from different profiles

From: Estimation of temporal and spatial variation of sound speed in ocean from GNSS-A measurements for observation using moored buoy

 Reference sound speed profile observed on:
 Each epoch6 June 20175 June 2019
EpochΔVϕRMSΔVϕRMSΔVϕRMS
(1)0.271210.040.271250.09
(2)0.211360.050.181330.060.201290.07
(3)0.142000.060.161970.060.231950.11
(4)0.111840.050.111830.050.141800.09
(5)0.181740.060.181710.080.181750.06
(6)0.161640.050.141560.10
  1. Note. ΔV magnitude of horizontal gradient (m/s/km), ϕ azimuth angle (degrees) RMS rms error of residual between observed and calculated travel time (ms)