PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-19:12:30
G02     215.8          58.3               13.9 +/-    0.54      16.1 +/-    0.54  0.030 / 0.080
G06     57.4           73.3               10.5 +/-    1.05      10.9 +/-    1.05  0.050 / 0.090
G12     319.2          38.2                8.8 +/-    1.05      13.2 +/-    1.05  0.040 / 0.060
G17     56.6           33.2                8.2 +/-    0.63      13.5 +/-    0.63  0.040 / 0.070
G19     35.4           51.6                9.1 +/-    0.52      11.3 +/-    0.52  0.060 / 0.070
G24     264.8          41.9               11.8 +/-    0.85      16.6 +/-    0.85  0.070 / 0.090
G28     122.2          14.2               11.3 +/-    1.99      28.8 +/-    1.99  0.120 / 0.290