PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-22:57:40
G02     216.9          62.2               13.7 +/-    0.89      15.3 +/-    0.89  0.040 / 0.070
G06     54.3           72.7               11.9 +/-    0.41      12.4 +/-    0.41  0.040 / 0.070
G12     319.1          37.7                9.6 +/-    1.55      14.5 +/-    1.55  0.060 / 0.090
G17     56.5           34.3               11.1 +/-    2.01      17.8 +/-    2.01  0.060 / 0.060
G19     39.3           49.5               10.8 +/-    1.93      13.7 +/-    1.93  0.150 / 0.320
G24     263.4          41.3               12.9 +/-    1.59      18.4 +/-    1.59  0.170 / 0.310
G28     123.6          12.5               14.1 +/-    2.56      37.3 +/-    2.56  0.040 / 0.030