PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-17:58:10
G02     25.6           61.7               15.1 +/-    0.56      16.9 +/-    0.56  0.030 / 0.040
G05     156.3          53.8               15.8 +/-    1.03      19.0 +/-    1.03  0.030 / 0.040
G06     50.6           21.2               11.1 +/-    0.42      23.8 +/-    0.42  0.040 / 0.060
G12     211.4          74.0               13.6 +/-    1.04      14.1 +/-    1.04  0.040 / 0.060
G19     96.1           11.9               14.3 +/-    1.55      38.2 +/-    1.55  0.030 / 0.040
G20     197.6          20.8               16.6 +/-    1.91      35.7 +/-    1.91  0.030 / 0.050
G25     302.1          52.4               15.4 +/-    1.00      18.8 +/-    1.00  0.080 / 0.300
G29     304.6          26.5               13.0 +/-    1.59      24.5 +/-    1.59  0.080 / 0.240