PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-12:58:00
G01     128.3          10.6              -10.0 +/-   38.52     -27.6 +/-   38.52  0.040 / 0.040
G07     47.6           69.7                6.7 +/-    0.50       7.1 +/-    0.50  0.030 / 0.030
G08     51.3           40.1                6.4 +/-    0.64       9.3 +/-    0.64  0.230 / 0.330
G09     176.9          36.2                8.4 +/-    1.24      13.0 +/-    1.24  0.220 / 0.310
G11     119.3          34.4                7.9 +/-    0.34      12.6 +/-    0.34  0.060 / 0.130
G13     321.5          10.4               -6.9 +/-   16.39     -19.2 +/-   16.39  0.050 / 0.120
G17     199.7          13.5                3.9 +/-    2.65      10.1 +/-    2.65  0.040 / 0.060
G18     105.0          15.8                7.5 +/-    1.11      18.3 +/-    1.11  0.040 / 0.060
G28     273.5          51.9                6.6 +/-    0.80       8.1 +/-    0.80  0.030 / 0.030
G30     329.9          58.4                4.9 +/-    0.78       5.6 +/-    0.78  0.030 / 0.030