PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-21:43:00
G01     74.2           33.3               12.8 +/-    0.73      21.0 +/-    0.73  0.110 / 0.080
G07     135.7          34.1               17.7 +/-    1.05      28.6 +/-    1.05  0.100 / 0.080
G11     57.1           34.1               11.6 +/-    1.96      18.8 +/-    1.96  0.070 / 0.030
G13     278.6          37.6               14.8 +/-    1.44      22.4 +/-    1.44  0.070 / 0.050
G15     304.9          14.8                8.7 +/-    2.31      21.8 +/-    2.31  0.030 / 0.010
G17     227.9          61.5               16.7 +/-    1.44      18.8 +/-    1.44  0.030 / 0.010
G18     51.8           19.9               11.3 +/-    5.30      24.9 +/-    5.30  0.070 / 0.030
G19     222.2          38.6               18.5 +/-    1.73      27.5 +/-    1.73  0.080 / 0.060
G28     15.3           59.8               13.2 +/-    0.71      15.0 +/-    0.71  0.300 / 0.270
G30     132.2          62.5               15.9 +/-    0.59      17.7 +/-    0.59  0.200 / 0.210