PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-15:57:50
G03     208.0          56.1               10.0 +/-    1.03      11.8 +/-    1.03  0.030 / 0.040
G07     257.2          15.0                8.5 +/-    1.61      21.2 +/-    1.61  0.030 / 0.040
G09     310.4          27.8                6.4 +/-    0.54      11.7 +/-    0.54  0.040 / 0.030
G16     92.0           64.2                8.8 +/-    0.94       9.7 +/-    0.94  0.030 / 0.040
G22     184.4          38.0                9.6 +/-    0.71      14.4 +/-    0.71  0.060 / 0.070
G23     336.0          63.7                8.6 +/-    0.47       9.5 +/-    0.47  0.060 / 0.070
G26     52.3           41.5                6.4 +/-    0.54       9.0 +/-    0.54  0.080 / 0.230
G27     133.3          11.1               11.6 +/-    4.76      31.6 +/-    4.76  0.060 / 0.210