PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-13:43:10
G07     31.7           69.5                9.5 +/-    0.43      10.1 +/-    0.43  0.110 / 0.230
G08     56.3           44.4               10.2 +/-    1.03      13.8 +/-    1.03  0.080 / 0.300
G09     177.8          42.0               10.2 +/-    1.04      14.3 +/-    1.04  0.040 / 0.040
G11     124.7          31.3                9.9 +/-    1.41      16.8 +/-    1.41  0.040 / 0.040
G18     109.6          13.2                9.4 +/-    2.39      24.5 +/-    2.39  0.030 / 0.030
G23     160.0          12.6                6.7 +/-    1.88      17.6 +/-    1.88  0.020 / 0.030
G27     38.5           12.6                7.0 +/-    2.48      18.3 +/-    2.48  0.120 / 0.210
G28     266.3          49.1                9.6 +/-    4.58      12.3 +/-    4.58  0.130 / 0.210
G30     325.1          54.6                8.9 +/-    0.30      10.7 +/-    0.30  0.120 / 0.270