PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-18:42:40
G01     115.7          20.4               18.1 +/-    2.12      39.5 +/-    2.12  0.100 / 0.070
G07     89.1           64.9               15.9 +/-    0.40      17.4 +/-    0.40  0.070 / 0.100
G08     44.3           30.8               12.9 +/-    1.13      22.2 +/-    1.13  0.030 / 0.030
G09     176.7          22.4               15.6 +/-    1.04      32.3 +/-    1.04  0.030 / 0.040
G11     103.2          41.4               16.6 +/-    0.70      23.6 +/-    0.70  0.030 / 0.040
G13     315.8          22.2               12.2 +/-    1.36      25.5 +/-    1.36  0.040 / 0.030
G17     203.8          25.2               17.7 +/-    1.62      34.4 +/-    1.62  0.040 / 0.060
G18     90.7           22.2               14.4 +/-    2.31      30.1 +/-    2.31  0.050 / 0.050
G28     300.5          58.9               14.0 +/-    1.05      16.1 +/-    1.05  0.160 / 0.260
G30     357.7          72.5               15.9 +/-    0.36      16.6 +/-    0.36  0.140 / 0.210