From 2462be1a6abca175fe2f4b12114798c47106c43d Mon Sep 17 00:00:00 2001
From: Daniel Warner <contact@danrw.com>
Date: Mon, 27 Aug 2018 11:54:28 +0100
Subject: [PATCH] Add a new constant

---
 libsgp4/Globals.h | 2 ++
 libsgp4/SGP4.cc   | 2 +-
 libsgp4/SGP4.h    | 1 -
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/libsgp4/Globals.h b/libsgp4/Globals.h
index d756832..c31fd80 100644
--- a/libsgp4/Globals.h
+++ b/libsgp4/Globals.h
@@ -70,5 +70,7 @@ const double kSECONDS_PER_DAY = 86400.0;
 const double kMINUTES_PER_DAY = 1440.0;
 const double kHOURS_PER_DAY = 24.0;
 
+const double kA3OVK2 = -kXJ3 / kCK2 * kAE * kAE * kAE;
+
 #endif
 
diff --git a/libsgp4/SGP4.cc b/libsgp4/SGP4.cc
index 460f3e3..82e622d 100644
--- a/libsgp4/SGP4.cc
+++ b/libsgp4/SGP4.cc
@@ -178,7 +178,7 @@ void SGP4::Initialise()
         double c3 = 0.0;
         if (elements_.Eccentricity() > 1.0e-4)
         {
-            c3 = coef * tsi * common_consts_.a3ovk2 * elements_.RecoveredMeanMotion() * kAE *
+            c3 = coef * tsi * kA3OVK2 * elements_.RecoveredMeanMotion() * kAE *
                     common_consts_.sinio / elements_.Eccentricity();
         }
 
diff --git a/libsgp4/SGP4.h b/libsgp4/SGP4.h
index fc181a4..17a2e33 100644
--- a/libsgp4/SGP4.h
+++ b/libsgp4/SGP4.h
@@ -53,7 +53,6 @@ private:
         double sinio;
         double eta;
         double t2cof;
-        double a3ovk2;
         double x1mth2;
         double x3thm1;
         double x7thm1;