PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-20:12:40
G01     39.9           14.8                9.4 +/-    3.06      23.6 +/-    3.06  0.050 / 0.060
G06     175.7          39.0               13.8 +/-    1.18      20.4 +/-    1.18  0.040 / 0.050
G13     235.4          21.4               13.7 +/-    1.91      29.1 +/-    1.91  0.210 / 0.460
G15     268.6          11.7               11.6 +/-    3.61      31.1 +/-    3.61  0.170 / 0.190
G17     4.7            69.4               11.1 +/-    0.90      11.8 +/-    0.90  0.030 / 0.030
G19     282.3          70.3               11.4 +/-    0.77      12.0 +/-    0.77  0.030 / 0.030
G24     315.6          21.0                9.0 +/-    4.27      19.3 +/-    4.27  0.080 / 0.270
G28     68.7           49.7               12.1 +/-    1.33      15.3 +/-    1.33  0.160 / 0.260
G30     154.3          23.8               15.3 +/-    1.73      30.7 +/-    1.73  0.090 / 0.220