PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-20:27:50
G01     98.5           28.9               12.7 +/-    1.24      22.7 +/-    1.24  0.040 / 0.050
G07     119.2          46.3               13.1 +/-    0.82      17.3 +/-    0.82  0.040 / 0.060
G08     41.6           12.8                8.8 +/-    2.23      23.1 +/-    2.23  0.060 / 0.140
G11     76.3           41.9               11.8 +/-    1.90      16.6 +/-    1.90  0.060 / 0.120
G13     302.3          33.7               10.6 +/-    1.47      17.2 +/-    1.47  0.040 / 0.040
G17     208.5          46.8               12.5 +/-    0.89      16.4 +/-    0.89  0.040 / 0.050
G18     69.3           23.8               10.6 +/-    1.01      21.2 +/-    1.01  0.120 / 0.340
G19     210.9          20.1               12.7 +/-    3.76      27.8 +/-    3.76  0.130 / 0.130
G28     324.6          60.9               10.2 +/-    0.99      11.5 +/-    0.99  0.030 / 0.020
G30     73.2           79.1               11.5 +/-    0.72      11.7 +/-    0.72  0.030 / 0.020