PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-20:12:50
G01     39.9           14.8                9.8 +/-    2.40      24.4 +/-    2.40  0.040 / 0.080
G06     175.7          39.0               14.8 +/-    1.29      21.9 +/-    1.29  0.040 / 0.060
G13     235.4          21.4               14.0 +/-    1.58      29.7 +/-    1.58  0.070 / 0.100
G15     268.6          11.7               11.5 +/-    2.43      30.8 +/-    2.43  0.070 / 0.080
G17     4.7            69.4               12.6 +/-    0.66      13.3 +/-    0.66  0.030 / 0.040
G19     282.3          70.3               12.0 +/-    0.60      12.7 +/-    0.60  0.030 / 0.040
G24     315.6          21.0                9.1 +/-    2.62      19.5 +/-    2.62  0.110 / 0.270
G28     68.7           49.7               11.7 +/-    0.57      14.8 +/-    0.57  0.140 / 0.200
G30     154.3          23.8               15.2 +/-    1.79      30.6 +/-    1.79  0.090 / 0.260