Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 4 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2018   10:43:03   (   0.09,-135.33) (   1.09,-139.70)  498.09                80
 04/19/2018   10:26:58   (   0.09,-135.35) (   0.08,-135.17)   20.65                80
 04/21/2018   22:27:31   (  -0.09,-135.40) (  -0.22,-135.95)   62.55                80
 04/22/2018   22:11:27   (  -0.10,-135.41) (   0.79,-131.42)  455.35                80
 04/24/2018   10:30:35   (   0.10,-135.43) (   0.37,-136.69)  144.10                80
 04/25/2018   10:14:31   (   0.10,-135.44) (  -0.64,-132.16)  373.71                80
 04/26/2018   22:33:47   (  -0.10,-135.46) (  -0.56,-137.46)  228.05                80
 04/27/2018   22:17:42   (  -0.10,-135.47) (   0.45,-132.93)  289.55                80
 04/29/2018   10:36:51   (   0.09,-135.48) (   0.72,-138.20)  310.74                80
 04/30/2018   10:20:46   (   0.10,-135.49) (  -0.30,-133.67)  206.61                80