PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-21:13:00
G01     38.7           12.1                8.9 +/-    1.55      23.7 +/-    1.55  0.070 / 0.340
G02     199.4          13.9               17.3 +/-    2.62      44.1 +/-    2.62  0.060 / 0.340
G06     172.7          46.1               14.9 +/-    1.38      19.7 +/-    1.38  0.090 / 0.190
G13     233.2          18.2               17.9 +/-    2.85      41.1 +/-    2.85  0.090 / 0.180
G15     266.3          10.2               14.3 +/-    2.80      39.8 +/-    2.80  0.050 / 0.080
G17     4.5            68.1               13.3 +/-    0.90      14.2 +/-    0.90  0.040 / 0.080
G19     292.0          70.1               13.5 +/-    0.55      14.2 +/-    0.55  0.110 / 0.350
G24     314.2          24.0               10.6 +/-    3.04      21.2 +/-    3.04  0.130 / 0.330
G28     79.2           43.7               12.3 +/-    1.02      16.9 +/-    1.02  0.120 / 0.190
G30     155.7          21.1               15.7 +/-    1.40      33.6 +/-    1.40  0.110 / 0.160