PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-18:27:40
G02     200.8          20.8               13.5 +/-    1.89      29.1 +/-    1.89  0.160 / 0.230
G06     168.3          56.2               13.9 +/-    0.64      16.4 +/-    0.64  0.110 / 0.220
G13     226.4          12.4               12.8 +/-    4.26      33.8 +/-    4.26  0.120 / 0.110
G17     21.4           59.9               12.9 +/-    0.89      14.7 +/-    0.89  0.160 / 0.100
G19     317.6          70.4               12.0 +/-    0.44      12.6 +/-    0.44  0.040 / 0.030
G24     308.8          31.0               12.1 +/-    2.59      20.7 +/-    2.59  0.030 / 0.040
G28     89.1           39.2               13.0 +/-    1.20      19.2 +/-    1.20  0.040 / 0.030
G30     157.4          14.0               13.3 +/-    2.41      33.8 +/-    2.41  0.030 / 0.030