diff --git a/Tle.cpp b/Tle.cpp
index 18e947e..5cb7fe8 100644
--- a/Tle.cpp
+++ b/Tle.cpp
@@ -130,6 +130,9 @@ void Tle::Initialize() {
     assert(!line_one_.empty());
     assert(!line_two_.empty());
 
+    assert(IsValidLine(line_one_, Tle::LINE_ONE));
+    assert(IsValidLine(line_two_, Tle::LINE_TWO));
+
     /*
      * line 1
      */
diff --git a/main.cpp b/main.cpp
index 12a53a4..df50ab7 100644
--- a/main.cpp
+++ b/main.cpp
@@ -7,6 +7,7 @@
 
 int main() {
     std::list<Tle> tles;
+#if 0
     tles.push_back(Tle("ALSAT 1                 ",
             "1 27559U 02054A   11083.20474426  .00000231  00000-0  46807-4 0  3956",
             "2 27559  97.8504 306.7237 0024736  97.8736 262.5269 14.69492531444449"));
@@ -41,7 +42,10 @@ int main() {
             "1 35683U 09041C   11083.19129526  .00000128  00000-0  29890-4 0  8539",
             "2 35683  98.0774 342.2478 0001262 104.0560 256.0776 14.69410764 88426"));
 
-
+#endif
+    tles.push_back(Tle("SGP4 Test",
+            "1 88888U          80275.98708465  .00073094  13844-3  66816-4 0     8",
+            "2 88888  72.8435 115.9689 0086731  52.6988 110.5714 16.05824518   105"));
     std::list<Tle>::iterator itr;
         Julian jul;