PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-18:12:40
G01     233.7          23.7               10.6 +/-    2.99      21.4 +/-    2.99  0.030 / 0.040
G03     302.0          63.9               11.1 +/-    0.99      12.2 +/-    0.99  0.030 / 0.030
G14     77.4           31.2               10.8 +/-    0.99      18.5 +/-    0.99  0.060 / 0.090
G16     154.3          35.4               11.3 +/-    1.30      17.9 +/-    1.30  0.060 / 0.090
G22     243.0          75.9               11.2 +/-    0.40      11.5 +/-    0.40  0.050 / 0.050
G23     301.0          32.0               10.0 +/-    1.80      16.8 +/-    1.80  0.050 / 0.060
G26     113.2          50.9               11.8 +/-    0.72      14.7 +/-    0.72  0.090 / 0.120
G31     42.3           40.0                9.1 +/-    1.21      13.3 +/-    1.21  0.110 / 0.140
G32     92.4           11.2               11.6 +/-    3.32      31.6 +/-    3.32  0.060 / 0.040