PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-18:58:10
G07     111.5          51.3               12.1 +/-    2.12      15.0 +/-    2.12  0.080 / 0.160
G08     41.7           19.2                8.3 +/-    3.00      18.6 +/-    3.00  0.060 / 0.150
G09     175.4          14.3               15.5 +/-    4.32      39.2 +/-    4.32  0.030 / 0.040
G11     86.1           43.0               12.4 +/-    2.65      17.2 +/-    2.65  0.030 / 0.040
G13     308.6          29.9                9.5 +/-   26.67      16.7 +/-   26.67  0.080 / 0.230
G17     205.2          39.0               13.3 +/-   25.31      19.7 +/-   25.31  0.070 / 0.180
G18     77.3           23.8               10.2 +/-    3.24      20.4 +/-    3.24  0.090 / 0.350
G19     208.7          14.0               14.2 +/-    3.04      36.3 +/-    3.04  0.100 / 0.350
G28     310.3          59.3                8.0 +/-   25.78       9.1 +/-   25.78  0.210 / 0.320
G30     36.7           78.7                7.6 +/-   26.03       7.8 +/-   26.03  0.140 / 0.310