PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-23:27:50
G10     257.5          31.2               17.1 +/-    2.18      29.2 +/-    2.18  0.120 / 0.320
G13     48.2           26.6               12.8 +/-    2.03      24.1 +/-    2.03  0.120 / 0.330
G15     73.7           55.6               14.6 +/-    0.36      17.3 +/-    0.36  0.040 / 0.100
G16     290.4          13.6               13.3 +/-    1.99      34.2 +/-    1.99  0.040 / 0.080
G18     281.2          59.9               15.4 +/-    0.62      17.5 +/-    0.62  0.030 / 0.050
G20     48.7           41.1               13.1 +/-    0.72      18.8 +/-    0.72  0.040 / 0.050
G21     345.2          66.1               13.1 +/-    1.21      14.2 +/-    1.21  0.130 / 0.270
G26     263.1          12.2               16.3 +/-    2.69      43.3 +/-    2.69  0.110 / 0.200
G27     321.2          12.9               11.8 +/-    1.15      30.9 +/-    1.15  0.090 / 0.200
G29     165.5          38.2               15.6 +/-    1.50      23.3 +/-    1.50  0.090 / 0.180