PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-00:28:10
G01     107.7          25.3                9.7 +/-    2.30      18.8 +/-    2.30  0.040 / 0.050
G07     105.7          58.9                9.6 +/-    1.14      10.9 +/-    1.14  0.040 / 0.040
G08     42.3           22.9                6.3 +/-    2.03      12.9 +/-    2.03  0.060 / 0.180
G09     175.7          15.1                9.4 +/-    2.27      23.3 +/-    2.27  0.130 / 0.200
G11     93.6           43.3               10.6 +/-    0.76      14.6 +/-    0.76  0.070 / 0.060
G13     310.6          27.6                6.7 +/-    1.29      12.4 +/-    1.29  0.070 / 0.080
G17     206.2          35.8               10.0 +/-    0.94      15.6 +/-    0.94  0.110 / 0.140
G19     208.9          12.8                8.7 +/-    6.13      22.8 +/-    6.13  0.130 / 0.170
G28     318.1          61.0                7.2 +/-    0.96       8.1 +/-    0.96  0.030 / 0.070
G30     43.8           77.8                8.8 +/-    0.66       8.9 +/-    0.66  0.030 / 0.030