PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-20:42:40
G02     200.3          22.5               14.5 +/-    2.82      30.1 +/-    2.82  0.050 / 0.080
G06     171.9          54.0               14.9 +/-    1.33      17.9 +/-    1.33  0.050 / 0.090
G13     225.1          12.3               12.9 +/-    2.76      34.3 +/-    2.76  0.040 / 0.060
G17     23.6           58.6               11.9 +/-    0.62      13.7 +/-    0.62  0.040 / 0.040
G19     329.5          70.9               11.9 +/-    0.91      12.5 +/-    0.91  0.040 / 0.030
G24     308.3          31.2                9.8 +/-    0.82      16.7 +/-    0.82  0.040 / 0.040
G28     86.2           42.7               12.6 +/-    0.84      17.6 +/-    0.84  0.090 / 0.760
G30     156.5          11.0               15.4 +/-    2.13      42.1 +/-    2.13  0.110 / 0.480