Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/05/2019   22:15:04   (  -0.37,-128.29) (  -1.35,-132.56)  487.83                80
 09/06/2019   21:58:59   (  -0.37,-128.27) (  -0.33,-128.03)   26.97                80
 09/09/2019   10:02:03   (   0.36,-128.25) (   0.45,-128.77)   59.38                80
 09/10/2019   09:40:37   (   0.36,-128.23) (  -0.51,-124.23)  454.75                80
 09/11/2019   22:02:34   (  -0.35,-128.17) (  -0.67,-129.53)  156.13                80
 09/12/2019   21:46:29   (  -0.35,-128.15) (   0.35,-125.00)  358.33                80
 09/14/2019   10:08:18   (   0.34,-128.15) (   0.79,-130.28)  242.31                80
 09/15/2019   09:46:52   (   0.35,-128.12) (  -0.17,-125.74)  271.64                80
 09/16/2019   22:08:48   (  -0.34,-128.05) (  -1.01,-131.04)  340.53                80
 09/17/2019   21:52:44   (  -0.34,-128.03) (   0.02,-126.51)  173.52                80
 09/19/2019   10:11:51   (   0.33,-128.02) (   1.19,-131.77)  427.47                80