only get previous day rinex for svs without current day rinex data

Author: betaBison

data/unit_test/ephemeris/nasa/BRDC00IGS_R_20201370000_01D_MN.rnx

@@ -137,11 +137,11 @@ BRD_LN  -------------------------------------------------   COMMENT
 BRD_ALL                                              1954   COMMENT
                                                             COMMENT
                                                             END OF HEADER
-E01 2020 05 16 00 10 00-8.573044906370E-04-7.958078640513E-12 0.000000000000E+00
-     9.700000000000E+01 2.140625000000E+01 2.881905757228E-09-7.706628025477E-01
-     1.022592186928E-06 8.040771353990E-05 5.146488547325E-06 5.440599456787E+03
-     5.190000000000E+05-5.960464477539E-08 9.537194534205E-01 3.911554813385E-08
-     9.829595197524E-01 2.410625000000E+02 1.537171327367E+00-5.523801517077E-09
-    -1.903650723265E-10 2.580000000000E+02 2.105000000000E+03
+E01 2020 05 16 00 20 00-8.573092636652E-04-7.958078640513E-12 0.000000000000E+00
+     9.800000000000E+01 2.128125000000E+01 2.882977230431E-09-6.963469912930E-01
+     1.020729541779E-06 8.037302177399E-05 5.139037966728E-06 5.440599388123E+03
+     5.196000000000E+05-6.891787052155E-08 9.537161867244E-01 2.607703208923E-08
+     9.829594553840E-01 2.413437500000E+02 1.537241247537E+00-5.521658570671E-09
+    -2.000083311498E-10 2.580000000000E+02 2.105000000000E+03
      3.120000000000E+00 0.000000000000E+00-1.629814505577E-09 0.000000000000E+00
-     5.197400000000E+05
+     5.203400000000E+05