All the subframe data now has scaled/unscaled.

1 files changed, 3 insertions, 1 deletions

diff --git a/subframe.c b/subframe.c
index 5ccb70a3..b42d8f8d 100644
--- a/subframe.c
+++ b/subframe.c
@@ -106,7 +106,9 @@ static void subframe_almanac(uint8_t tSVID, uint32_t words[],
     almp->d_omega  = pow(2.0, -23) * almp->omega;
     almp->M0       = ( words[8] & 0x00FFFFFF);
     almp->M0       = uint2int(almp->M0, 24);
-    almp->d_M0     = pow(2.0,-23) * almp->M0 * GPS_PI;
+    /* if you want radians, multiply by GPS_PI, but we do semi-circles
+     * to match IS-GPS-200E */
+    almp->d_M0     = pow(2.0,-23) * almp->M0;
     almp->af1      = ((words[9] >>  5) & 0x0007FF);
     almp->af1      = (short)uint2int(almp->af1, 11);
     almp->d_af1    = pow(2.0,-38) * almp->af1;