diff --git a/navmon.cc b/navmon.cc
index e179ec2..b331379 100644
--- a/navmon.cc
+++ b/navmon.cc
@@ -307,3 +307,25 @@ string makeHexDump(const string& str)
   }
   return ret;
 }
+
+std::string sbasName(int prn)
+{
+  string sbas;
+  if(prn == 138 || prn == 131 || prn == 133) {
+    sbas = "WAAS";
+  }
+  else if(prn== 126 || prn == 136 || prn == 123 ) {
+    sbas = "EGNOS";
+  }
+  else if(prn == 140 || prn == 125 || prn == 141) {
+    sbas = "SDCM";
+  }
+  else if(prn == 127 || prn == 128 || prn == 138) {
+    sbas ="GAGAN";
+  }
+  else
+    sbas ="SBAS";
+
+  sbas+=" " + std::to_string(prn);
+  return sbas;
+}
diff --git a/navmon.hh b/navmon.hh
index 1184122..941d225 100644
--- a/navmon.hh
+++ b/navmon.hh
@@ -66,6 +66,8 @@ char getGNSSChar(int id);
 std::string makeSatIDName(const SatID& satid);
 std::string makeSatPartialName(const SatID& satid);
 
+std::string sbasName(int prn);
+
 extern int g_dtLS, g_dtLSBeidou;
 uint64_t utcFromGST(int wn, int tow);
 double utcFromGST(int wn, double tow);