PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-20:58:00
G01     63.2           31.6                9.9 +/-    1.40      16.9 +/-    1.40  0.140 / 0.290
G07     141.0          25.4               13.4 +/-    0.98      25.9 +/-    0.98  0.110 / 0.290
G11     50.3           27.0                8.0 +/-    2.11      14.8 +/-    2.11  0.060 / 0.070
G13     266.4          36.1               14.3 +/-    1.36      22.2 +/-    1.36  0.060 / 0.070
G15     296.6          16.2               12.7 +/-    1.75      30.7 +/-    1.75  0.090 / 0.200
G17     244.5          70.4               12.7 +/-    0.48      13.4 +/-    0.48  0.120 / 0.260
G18     44.5           15.0                8.6 +/-    2.08      21.4 +/-    2.08  0.080 / 0.110
G19     229.8          47.0               13.3 +/-    2.30      17.4 +/-    2.30  0.060 / 0.130
G28     31.6           57.4               12.6 +/-    0.92      14.7 +/-    0.92  0.030 / 0.030
G30     141.3          53.8               13.8 +/-    0.33      16.6 +/-    0.33  0.030 / 0.040