PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-17:57:40
G03     196.2          39.7               13.8 +/-    2.28      20.2 +/-    2.28  0.040 / 0.050
G07     269.8          24.4               11.2 +/-    1.29      22.2 +/-    1.29  0.030 / 0.040
G09     316.8          40.7               11.3 +/-    1.36      16.2 +/-    1.36  0.080 / 0.070
G16     59.3           57.9               12.3 +/-    0.39      14.3 +/-    0.39  0.070 / 0.080
G22     181.4          23.7               12.1 +/-    4.08      24.3 +/-    4.08  0.070 / 0.150
G23     359.7          76.0               11.0 +/-    0.66      11.3 +/-    0.66  0.080 / 0.160
G26     44.6           29.0                8.8 +/-    1.68      15.8 +/-    1.68  0.090 / 0.240
G27     121.0          21.5               15.7 +/-    1.09      33.3 +/-    1.09  0.080 / 0.200