PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-22:42:50
G02     217.6          62.7               15.8 +/-    0.88      17.6 +/-    0.88  0.040 / 0.050
G06     53.0           72.0               13.1 +/-    0.48      13.7 +/-    0.48  0.040 / 0.050
G12     319.3          38.4               11.3 +/-    0.74      16.9 +/-    0.74  0.040 / 0.040
G17     57.2           33.7               10.6 +/-    0.47      17.2 +/-    0.47  0.040 / 0.050
G19     39.9           49.1               11.7 +/-    1.00      14.9 +/-    1.00  0.060 / 0.090
G24     262.5          41.2               15.3 +/-    1.81      21.8 +/-    1.81  0.060 / 0.080
G28     124.0          12.0               15.0 +/-    1.54      39.9 +/-    1.54  0.040 / 0.080