PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-19:27:50
G01     69.7           32.9               14.8 +/-    0.69      24.5 +/-    0.69  0.060 / 0.100
G07     138.0          30.6               17.3 +/-    1.15      29.9 +/-    1.15  0.070 / 0.120
G11     53.5           30.8               13.5 +/-    0.99      23.3 +/-    0.99  0.120 / 0.370
G13     273.4          37.4               15.9 +/-    1.08      24.2 +/-    1.08  0.100 / 0.330
G15     302.2          15.2                9.3 +/-    2.71      23.1 +/-    2.71  0.030 / 0.070
G17     233.9          66.7               16.1 +/-    0.73      17.3 +/-    0.73  0.030 / 0.050
G18     48.5           18.0               10.9 +/-    0.95      25.1 +/-    0.95  0.080 / 0.140
G19     224.9          41.4               16.9 +/-    0.68      24.1 +/-    0.68  0.060 / 0.130
G28     21.7           59.0               14.2 +/-    0.29      16.3 +/-    0.29  0.030 / 0.050
G30     136.5          60.1               17.2 +/-    0.87      19.6 +/-    0.87  0.040 / 0.050