PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-21:27:50
G01     78.1           33.3               12.0 +/-    1.26      19.6 +/-    1.26  0.130 / 0.160
G07     133.6          37.0               13.1 +/-    0.81      20.1 +/-    0.81  0.100 / 0.110
G11     59.8           36.0               11.0 +/-    0.87      17.2 +/-    0.87  0.100 / 0.040
G13     282.7          37.6               11.5 +/-    1.31      17.5 +/-    1.31  0.100 / 0.040
G15     307.6          13.9                9.0 +/-    2.43      23.0 +/-    2.43  0.160 / 0.190
G17     224.1          58.4               12.6 +/-    2.24      14.5 +/-    2.24  0.280 / 0.410
G18     54.6           21.2               11.1 +/-    4.17      23.7 +/-    4.17  0.030 / 0.010
G19     220.1          35.7               14.7 +/-    2.55      23.1 +/-    2.55  0.040 / 0.010
G28     9.4            60.4               11.3 +/-    1.43      12.8 +/-    1.43  0.050 / 0.030
G30     128.1          65.6               12.9 +/-    0.62      14.0 +/-    0.62  0.050 / 0.030