PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-00:57:40
G02     282.1          81.7                8.6 +/-    1.18       8.7 +/-    1.18  0.030 / 0.040
G05     167.7          24.0               15.3 +/-    1.13      30.6 +/-    1.13  0.030 / 0.040
G06     40.0           50.5                7.1 +/-    0.31       9.0 +/-    0.31  0.050 / 0.040
G12     320.4          59.9                9.6 +/-    0.73      10.9 +/-    0.73  0.040 / 0.050
G17     75.5           21.3                9.3 +/-    0.81      19.8 +/-    0.81  0.060 / 0.140
G19     64.1           34.8                8.9 +/-    0.41      14.3 +/-    0.41  0.060 / 0.160
G24     237.6          30.1               12.7 +/-    2.01      22.2 +/-    2.01  0.080 / 0.170
G25     317.7          18.2                7.3 +/-    1.76      16.8 +/-    1.76  0.090 / 0.170