PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-17:43:00
G01     256.5          37.5                9.4 +/-    0.88      14.3 +/-    0.88  0.040 / 0.040
G03     316.5          42.4                8.7 +/-    2.46      12.1 +/-    2.46  0.040 / 0.050
G11     243.5          15.1                9.6 +/-    2.50      23.8 +/-    2.50  0.080 / 0.160
G14     54.4           44.6                8.1 +/-    1.01      11.0 +/-    1.01  0.120 / 0.170
G22     308.8          63.4                9.0 +/-    0.82      10.0 +/-    0.82  0.040 / 0.050
G23     283.8          17.7                6.4 +/-   10.07      14.9 +/-   10.07  0.040 / 0.040
G25     43.5           12.9                6.8 +/-    1.05      17.8 +/-    1.05  0.060 / 0.080
G26     139.7          34.4               11.3 +/-    0.76      18.1 +/-    0.76  0.050 / 0.110
G31     42.4           62.5                8.6 +/-    0.44       9.5 +/-    0.44  0.080 / 0.260
G32     73.9           25.1                9.2 +/-    0.61      17.9 +/-    0.61  0.080 / 0.290