PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-15:43:10
G03     209.1          56.9                9.5 +/-    0.61      11.1 +/-    0.61  0.030 / 0.050
G07     256.6          14.5                8.4 +/-    1.08      21.1 +/-    1.08  0.030 / 0.040
G09     310.0          27.2                7.0 +/-    0.57      13.0 +/-    0.57  0.040 / 0.030
G16     93.9           64.2                8.8 +/-    0.68       9.6 +/-    0.68  0.040 / 0.040
G22     184.4          38.6                9.5 +/-    1.05      14.1 +/-    1.05  0.070 / 0.080
G23     335.4          63.2                8.7 +/-    0.72       9.7 +/-    0.72  0.080 / 0.090
G26     52.9           42.0                7.9 +/-    1.00      11.1 +/-    1.00  0.080 / 0.100
G27     133.9          10.6               -1.0 +/-   35.70      -2.7 +/-   35.70  0.090 / 0.180