Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2020   09:46:08   (  -0.01,-128.05) (  -0.55,-125.75)  262.70                80
 12/07/2020   22:10:42   (  -0.03,-128.09) (  -0.69,-131.04)  336.35                80
 12/08/2020   21:49:17   (  -0.00,-128.10) (   0.38,-126.52)  181.75                80
 12/10/2020   10:13:43   (   0.04,-128.12) (   0.86,-131.77)  415.65                80
 12/11/2020   09:52:17   (   0.02,-128.14) (  -0.16,-127.23)  102.40                80
 12/12/2020   22:16:52   (  -0.06,-128.17) (  -1.02,-132.54)  497.14                80
 12/13/2020   21:55:27   (  -0.04,-128.18) (  -0.01,-128.00)   20.22                80
 12/16/2020   10:01:08   (   0.07,-128.19) (   0.16,-128.74)   61.38                80
 12/17/2020   09:39:42   (   0.04,-128.20) (  -0.85,-124.20)  455.86                80
 12/18/2020   22:04:17   (  -0.08,-128.23) (  -0.38,-129.49)  144.40                80
 12/19/2020   21:42:51   (  -0.06,-128.24) (   0.64,-124.96)  372.55                80