Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/18/2021   10:01:22   (  -0.19,-127.95) (   0.04,-128.85)  102.77                80
 02/19/2021   09:39:57   (  -0.19,-127.98) (  -0.99,-124.32)  416.64                80
 02/20/2021   22:01:54   (   0.18,-128.06) (  -0.18,-129.63)  178.77                80
 02/21/2021   21:45:49   (   0.18,-128.09) (   0.85,-125.10)  340.66                80
 02/23/2021   10:07:37   (  -0.17,-128.09) (   0.35,-130.36)  259.53                80
 02/24/2021   09:46:12   (  -0.17,-128.11) (  -0.68,-125.84)  259.01                80
 02/25/2021   22:08:08   (   0.16,-128.17) (  -0.49,-131.14)  338.25                80
 02/26/2021   21:52:04   (   0.17,-128.19) (   0.54,-126.62)  180.53                80
 02/28/2021   10:13:51   (  -0.16,-128.20) (   0.66,-131.88)  419.67                80
 03/01/2021   09:52:27   (  -0.16,-128.21) (  -0.37,-127.35)   98.29                80