Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2015 12 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/18/2015   07:43:13   (   0.07,-135.12) (  -0.49,-137.79)  302.90                80
 12/20/2015   07:28:21   (   0.07,-135.05) (   0.14,-134.82)   26.72                80
 12/22/2015   07:16:08   (   0.08,-134.98) (   0.75,-131.86)  355.51                80
 12/22/2015   19:37:22   (  -0.06,-134.99) (   0.36,-137.01)  229.97                80
 12/24/2015   19:27:49   (  -0.06,-134.91) (  -0.23,-134.04)   98.14                80
 12/25/2015   07:49:13   (   0.04,-134.87) (  -0.87,-139.23)  495.86                80
 12/26/2015   19:15:37   (  -0.06,-134.83) (  -0.87,-131.08)  425.76                80
 12/27/2015   07:37:00   (   0.04,-134.79) (  -0.30,-136.26)  168.49                80
 12/29/2015   07:22:08   (   0.05,-134.70) (   0.32,-133.30)  158.55                80
 12/29/2015   19:43:24   (  -0.03,-134.69) (   0.75,-138.46)  428.44                80
 12/31/2015   07:09:57   (   0.04,-134.61) (   0.98,-130.35)  485.16                80
 12/31/2015   19:31:12   (  -0.03,-134.60) (   0.15,-135.50)  101.86                80