Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 6 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/15/2019   10:11:43   (  -0.05,-128.29) (   0.77,-131.90)  411.70                80
 06/16/2019   09:55:38   (  -0.04,-128.27) (  -0.23,-127.36)  102.61                80
 06/18/2019   21:58:51   (   0.05,-128.21) (   0.07,-128.14)    8.23                80
 06/21/2019   09:59:15   (  -0.06,-128.16) (   0.11,-128.88)   81.98                80
 06/22/2019   09:43:11   (  -0.05,-128.14) (  -0.89,-124.35)  431.96                80
 06/23/2019   22:02:28   (   0.07,-128.10) (  -0.27,-129.66)  177.74                80
 06/24/2019   21:46:23   (   0.06,-128.07) (   0.73,-125.12)  336.35                80
 06/26/2019   10:05:32   (  -0.08,-128.04) (   0.45,-130.39)  268.23                80
 06/27/2019   09:49:27   (  -0.07,-128.01) (  -0.55,-125.86)  245.20                80