PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-21:57:20
G02     203.2          35.9               17.2 +/-    1.36      26.9 +/-    1.36  0.290 / 0.240
G06     156.5          70.3               16.8 +/-    0.56      17.7 +/-    0.56  0.270 / 0.260
G12     308.1          16.3               11.5 +/-    2.99      27.7 +/-    2.99  0.070 / 0.080
G17     33.4           51.4               13.5 +/-    1.11      16.8 +/-    1.11  0.080 / 0.080
G19     359.2          65.5               13.1 +/-    0.49      14.3 +/-    0.49  0.030 / 0.030
G24     297.0          38.5               12.8 +/-    1.79      19.0 +/-    1.79  0.030 / 0.030
G28     103.3          30.5               13.8 +/-    0.77      23.9 +/-    0.77  0.080 / 0.140