Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/04/2019   22:04:31   (  -0.05,-127.99) (  -0.37,-129.53)  174.89                80
 04/05/2019   21:43:06   (  -0.05,-127.97) (   0.64,-125.00)  338.80                80
 04/07/2019   10:04:52   (   0.05,-127.94) (   0.55,-130.26)  264.35                80
 04/08/2019   09:48:47   (   0.05,-127.90) (  -0.46,-125.72)  249.01                80
 04/09/2019   22:08:01   (  -0.05,-127.84) (  -0.79,-131.01)  362.38                80
 04/10/2019   21:51:56   (  -0.06,-127.80) (   0.22,-126.47)  150.40                80
 04/12/2019   10:11:02   (   0.06,-127.75) (   0.97,-131.74)  454.46                80
 04/13/2019   09:54:57   (   0.06,-127.71) (  -0.04,-127.20)   57.99                80
 04/15/2019   21:55:26   (  -0.07,-127.59) (  -0.13,-127.96)   42.23                80
 04/16/2019   21:39:21   (  -0.07,-127.55) (   0.88,-123.43)  469.94                80