Add patch in case GLONASS N_T is not available in RTCM3 stream

fenrir-naru · Mar 27, 2024 · 9035b8f · 9035b8f
1 parent 537ab89
commit 9035b8f
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diff --git a/lib/gps_pvt/receiver/extension.rb b/lib/gps_pvt/receiver/extension.rb
@@ -127,6 +127,10 @@ def F_T_index
     f_t = send(:F_T)
     (f_t < 0) ? -1 : F_T_TABLE.find_index{|v| f_t <= v}
   end
+  def NA
+    # based on TimeProperties::date2raw
+    self.day_of_year + [1, 367, 732, 1097][(self.year - 1996) % 4]
+  end
 end
 
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diff --git a/lib/gps_pvt/receiver/rtcm3.rb b/lib/gps_pvt/receiver/rtcm3.rb
@@ -205,6 +205,7 @@ def parse_rtcm3(src, opt = {}, &b)
               ? date_src \
               : [(ref_time + 3 * 60 * 60).c_tm(leap_sec)])) # UTC -> Moscow time
         }.call([:N_4, :NA].collect{|k| params[k]})
+        eph.N_T = params[:NA] || eph.NA unless params[:N_T] # N_T is available only for GLONASS-M
         eph.rehash(leap_sec)
         critical{
           @solver.glonass_space_node.register_ephemeris(eph.svid, eph)