Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2020   10:07:42   (  -0.09,-128.31) (   0.38,-130.35)  232.65                80
 05/12/2020   09:46:17   (  -0.10,-128.31) (  -0.65,-125.82)  283.36                80
 05/13/2020   22:10:54   (   0.07,-128.30) (  -0.53,-131.12)  320.88                80
 05/14/2020   21:49:28   (   0.08,-128.30) (   0.44,-126.58)  195.62                80
 05/16/2020   10:13:56   (  -0.06,-128.31) (   0.75,-131.85)  403.00                80
 05/17/2020   09:52:31   (  -0.07,-128.31) (  -0.28,-127.32)  112.84                80
 05/18/2020   22:17:06   (   0.04,-128.29) (  -0.95,-132.61)  492.53                80
 05/19/2020   21:58:22   (   0.06,-128.29) (   0.08,-128.08)   23.70                80
 05/22/2020   10:01:25   (  -0.05,-128.29) (   0.08,-128.82)   59.99                80
 05/23/2020   09:40:00   (  -0.07,-128.28) (  -0.95,-124.29)  454.97                80
 05/24/2020   22:04:36   (   0.04,-128.25) (  -0.27,-129.58)  152.21                80