Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/10/2020   10:13:43   (   0.04,-128.12) (   0.84,-131.77)  415.24                80
 12/11/2020   09:52:18   (   0.02,-128.14) (  -0.18,-127.24)  103.00                80
 12/12/2020   22:16:52   (  -0.06,-128.18) (  -1.06,-132.53)  495.84                80
 12/13/2020   21:55:27   (  -0.04,-128.19) (   0.01,-128.01)   21.74                80
 12/16/2020   10:01:07   (   0.07,-128.21) (   0.21,-128.73)   59.81                80
 12/17/2020   09:39:43   (   0.04,-128.22) (  -0.87,-124.21)  457.63                80
 12/18/2020   22:04:17   (  -0.08,-128.25) (  -0.37,-129.49)  141.95                80
 12/19/2020   21:42:52   (  -0.06,-128.26) (   0.65,-124.96)  375.16                80
 12/21/2020   10:07:18   (   0.10,-128.26) (   0.52,-130.23)  224.30                80
 12/22/2020   09:45:52   (   0.08,-128.27) (  -0.50,-125.69)  293.00                80
 12/23/2020   22:10:27   (  -0.12,-128.30) (  -0.73,-130.99)  306.39                80