PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/14-16:42:50
G02     218.2          59.2                9.8 +/-    1.01      11.2 +/-    1.01  0.060 / 0.100
G06     52.1           70.5                9.2 +/-    0.64       9.7 +/-    0.64  0.090 / 0.090
G12     320.6          42.2                8.8 +/-    1.34      12.3 +/-    1.34  0.060 / 0.060
G17     59.7           30.1                8.9 +/-    0.69      15.6 +/-    0.69  0.080 / 0.070
G19     37.5           50.7                8.4 +/-    0.58      10.4 +/-    0.58  0.040 / 0.030
G24     260.6          41.4                9.9 +/-    1.52      14.0 +/-    1.52  0.030 / 0.030
G28     123.7          12.5                9.2 +/-    2.62      24.4 +/-    2.62  0.040 / 0.050