Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/08/2020   22:04:39   (   0.10,-128.30) (  -0.22,-129.61)  150.63                80
 05/09/2020   21:43:15   (   0.11,-128.30) (   0.81,-125.08)  366.20                80
 05/11/2020   10:07:42   (  -0.09,-128.31) (   0.38,-130.35)  232.28                80
 05/12/2020   09:46:17   (  -0.10,-128.31) (  -0.65,-125.82)  283.86                80
 05/13/2020   22:10:54   (   0.07,-128.30) (  -0.53,-131.12)  320.55                80
 05/14/2020   21:49:28   (   0.08,-128.31) (   0.44,-126.58)  196.07                80
 05/16/2020   10:13:56   (  -0.06,-128.32) (   0.75,-131.85)  402.01                80
 05/17/2020   09:52:31   (  -0.07,-128.32) (  -0.28,-127.32)  113.95                80
 05/18/2020   22:17:06   (   0.04,-128.30) (  -0.95,-132.61)  491.55                80
 05/19/2020   21:58:22   (   0.06,-128.30) (   0.08,-128.08)   24.77                80
 05/22/2020   10:01:25   (  -0.05,-128.31) (   0.08,-128.82)   58.27                80