PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/13-11:57:40
G02     229.6          70.6                4.5 +/-    0.86       4.7 +/-    0.86  0.040 / 0.040
G06     42.8           63.0                3.9 +/-    0.48       4.3 +/-    0.48  0.030 / 0.040
G12     321.3          48.1                2.7 +/-    1.36       3.5 +/-    1.36  0.050 / 0.100
G17     65.2           26.4                3.0 +/-    0.79       5.7 +/-    0.79  0.060 / 0.090
G19     52.4           40.4                4.2 +/-    1.01       6.1 +/-    1.01  0.090 / 0.540
G24     253.4          37.4                4.5 +/-    1.58       6.9 +/-    1.58  0.090 / 0.420
G28     127.5          12.3                4.6 +/-    3.26      12.1 +/-    3.26  0.040 / 0.070