PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-11:58:00
G03     189.1329       13.9980          5.4937 +/-  3.8156   13.9986 +/-  3.8156  0.030 / 0.040
G07     303.6927       45.8195          2.7851 +/-  0.8055    3.7100 +/-  0.8055  0.030 / 0.040
G08     130.8473       36.8078          4.8408 +/-  0.8021    7.4343 +/-  0.8021  0.050 / 0.130
G09     315.2139       75.1067          3.3044 +/-  0.6640    3.4071 +/-  0.6640  0.060 / 0.130
G16     41.4846        30.4708          2.0522 +/-  0.8576    3.5589 +/-  0.8576  0.200 / 0.420
G23     137.0821       71.2950          3.9322 +/-  1.0495    4.1276 +/-  1.0495  0.210 / 0.450
G27     85.3698        36.3224          3.3280 +/-  0.4396    5.1556 +/-  0.4396  0.030 / 0.070
G30     280.1015       16.5328          4.8247 +/-  1.7491   11.5596 +/-  1.7491  0.040 / 0.070