Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2017 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2017   06:42:11   (   0.06,-135.06) (  -0.58,-138.03)  337.76                80
 07/22/2017   06:18:50   (   0.08,-135.03) (   0.51,-133.03)  227.44                80
 07/23/2017   18:40:21   (  -0.05,-135.05) (   0.51,-137.59)  289.79                80
 07/24/2017   18:17:01   (  -0.08,-135.01) (  -0.63,-132.60)  275.12                80
 07/26/2017   06:38:40   (   0.05,-134.90) (  -0.49,-137.18)  260.87                80
 07/27/2017   06:15:20   (   0.08,-134.86) (   0.66,-132.19)  304.00                80
 07/28/2017   18:36:50   (  -0.04,-134.87) (   0.37,-136.75)  213.49                80
 07/29/2017   18:13:31   (  -0.07,-134.84) (  -0.78,-131.76)  351.14                80
 07/31/2017   06:35:09   (   0.03,-134.71) (  -0.33,-136.34)  185.37                80
 08/01/2017   06:11:50   (   0.06,-134.67) (   0.81,-131.35)  378.92                80
 08/02/2017   18:33:19   (  -0.02,-134.68) (   0.27,-135.90)  139.59                80