PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-22:12:50
G01     45.8           21.9               11.1 +/-    1.09      23.2 +/-    1.09  0.090 / 0.240
G06     176.4          31.2               17.6 +/-    2.41      30.0 +/-    2.41  0.090 / 0.230
G11     44.0           11.6               11.0 +/-    2.27      29.7 +/-    2.27  0.060 / 0.120
G13     245.1          27.0               17.5 +/-    2.92      32.6 +/-    2.92  0.050 / 0.140
G15     278.1          14.6               13.2 +/-    1.18      33.2 +/-    1.18  0.050 / 0.060
G17     319.6          76.4               13.6 +/-    1.16      14.0 +/-    1.16  0.050 / 0.080
G19     256.8          63.5               13.7 +/-    0.61      15.1 +/-    0.61  0.200 / 0.320
G24     318.5          12.8                8.2 +/-    2.73      21.5 +/-    2.73  0.130 / 0.300
G28     61.4           50.2               12.5 +/-    0.86      15.7 +/-    0.86  0.140 / 0.480
G30     151.7          33.9               15.6 +/-    1.33      25.3 +/-    1.33  0.150 / 0.430