diff --git a/.hgignore b/.hgignore
index cd3cbf1..84161eb 100644
--- a/.hgignore
+++ b/.hgignore
@@ -3,6 +3,7 @@ Release\*
 Debug\*
 *.o
 RunTest
+SatTrack
 *.txt
 *.orig
 *.a
diff --git a/Makefile b/Makefile
index 8ec7cd0..ae85ef2 100644
--- a/Makefile
+++ b/Makefile
@@ -17,16 +17,23 @@ OBJECTS=$(SOURCES:.cpp=.o)
 SGP4LIB=libsgp4.a
 
 TESTPROG=RunTest
-TESTSOURCES=RunTest.cpp
-TESTOBJECTS=$(TESTSOURCES:.cpp=.o)
+TESTPROGSOURCES=RunTest.cpp
+TESTPROGOBJECTS=$(TESTPROGSOURCES:.cpp=.o)
 
-all: $(SGP4LIB) ${TESTPROG}
+SATTRACK=SatTrack
+SATTRACKSOURCES=SatTrack.cpp
+SATTRACKOBJECTS=$(SATTRACKSOURCES:.cpp=.o)
+
+all: $(SGP4LIB) ${TESTPROG} ${SATTRACK}
 
 ${SGP4LIB}: ${OBJECTS}
 	${AR} -rcs -o $@ ${OBJECTS}
 
-${TESTPROG}: ${SGP4LIB} ${TESTOBJECTS}
-	$(CC) ${TESTOBJECTS} $(LDFLAGS) -static -L. -lsgp4 -o $@
+${TESTPROG}: ${SGP4LIB} ${TESTPROGOBJECTS}
+	$(CC) ${TESTPROGOBJECTS} $(LDFLAGS) -static -L. -lsgp4 -o $@
+
+${SATTRACK}: ${SGP4LIB} ${SATTRACKOBJECTS}
+	${CC} ${SATTRACKOBJECTS} ${LDFLAGS} -static -L. -lsgp4 -o $@
 
 .cpp.o:
 	$(CC) $(CFLAGS) $< -o $@
diff --git a/SatTrack.cpp b/SatTrack.cpp
new file mode 100644
index 0000000..342fa76
--- /dev/null
+++ b/SatTrack.cpp
@@ -0,0 +1,26 @@
+#include "Observer.h"
+#include "SGP4.h"
+
+#include <iostream>
+
+int main() {
+
+  Observer obs(51.37322,0.089607,0.05);
+  Tle tle = Tle("ISS (ZARYA)             ",
+    "1 25544U 98067A   11146.36888985  .00025753  00000-0  16912-3 0  4201",
+    "2 25544  51.6504 272.6534 0003891 329.5510  71.2188 15.75539412717473");
+  SGP4 sgp4;
+  sgp4.SetTle(tle);
+  Eci eci;
+
+  while(1) {
+    Julian now;
+    sgp4.FindPosition(&eci, now);
+    CoordTopographic topo = obs.GetLookAngle(eci);
+    CoordGeodetic geo = eci.ToGeodetic();
+    std::cout << topo << " ";
+    std::cout << geo << std::endl;
+  };
+
+  return 0;
+}