PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-13:57:50
G03     197.1          37.3                9.3 +/-    1.69      14.1 +/-    1.69  0.220 / 0.290
G07     273.6          27.0                8.5 +/-    1.80      15.8 +/-    1.80  0.150 / 0.260
G08     154.5          13.1               10.9 +/-    4.17      28.3 +/-    4.17  0.080 / 0.130
G09     318.6          45.8                8.3 +/-    0.90      11.1 +/-    0.90  0.080 / 0.120
G16     52.7           53.1                9.2 +/-    0.68      11.2 +/-    0.68  0.110 / 0.150
G22     180.0          19.2                8.9 +/-    1.87      20.1 +/-    1.87  0.110 / 0.150
G23     21.3           79.7                9.5 +/-    1.39       9.6 +/-    1.39  0.030 / 0.030
G26     43.5           24.5                9.3 +/-    2.23      18.3 +/-    2.23  0.030 / 0.030
G27     117.7          24.3               12.0 +/-    0.66      23.8 +/-    0.66  0.040 / 0.040