PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-01:57:30
G02     27.2           60.6                8.1 +/-    0.38       9.1 +/-    0.38  0.020 / 0.040
G05     147.2          55.9               12.4 +/-    0.63      14.7 +/-    0.63  0.020 / 0.040
G06     50.0           21.5                5.6 +/-    2.80      11.9 +/-    2.80  0.030 / 0.050
G12     215.1          75.6               10.3 +/-    0.91      10.6 +/-    0.91  0.040 / 0.050
G19     93.5           15.4                9.1 +/-    1.30      22.4 +/-    1.30  0.040 / 0.080
G25     306.9          47.1                8.4 +/-    1.19      10.9 +/-    1.19  0.050 / 0.070
G29     301.7          22.0                7.8 +/-    2.13      16.3 +/-    2.13  0.040 / 0.050