PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-20:27:50
G01     49.4           25.0               11.9 +/-    2.29      23.3 +/-    2.29  0.120 / 0.310
G06     177.0          26.6               19.7 +/-    1.02      37.1 +/-    1.02  0.130 / 0.400
G07     146.6          12.1               16.8 +/-    2.80      44.7 +/-    2.80  0.050 / 0.060
G11     44.7           15.2               11.2 +/-    2.16      27.8 +/-    2.16  0.060 / 0.060
G13     249.8          29.9               18.0 +/-    1.61      31.6 +/-    1.61  0.110 / 0.150
G15     283.3          15.4               13.9 +/-    1.59      34.2 +/-    1.59  0.150 / 0.180
G17     302.2          77.6               16.5 +/-    0.56      16.8 +/-    0.56  0.090 / 0.140
G19     247.3          59.2               16.9 +/-    0.82      19.4 +/-    0.82  0.110 / 0.110
G28     54.1           52.4               14.8 +/-    0.98      18.2 +/-    0.98  0.040 / 0.050
G30     149.9          39.6               17.7 +/-    0.99      25.8 +/-    0.99  0.040 / 0.050