Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2023 1 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2023   09:57:00   (   0.02,-128.17) (  -0.20,-127.32)   97.57                80
 01/20/2023   21:57:32   (  -0.02,-128.15) (  -0.00,-128.08)    7.64                80
 01/23/2023   10:00:37   (   0.01,-128.22) (   0.15,-128.82)   69.14                80
 01/24/2023   09:44:34   (   0.01,-128.23) (  -0.90,-124.30)  448.37                80
 01/25/2023   22:06:30   (  -0.00,-128.20) (  -0.34,-129.59)  159.02                80
 01/26/2023   21:45:07   (  -0.00,-128.21) (   0.72,-125.07)  358.25                80
 01/28/2023   10:06:55   (   0.00,-128.26) (   0.47,-130.33)  236.32                80
 01/29/2023   09:50:50   (  -0.00,-128.27) (  -0.53,-125.80)  281.01                80
 01/30/2023   22:12:48   (   0.00,-128.24) (  -0.63,-131.11)  326.47                80
 01/31/2023   21:51:23   (   0.01,-128.24) (   0.38,-126.57)  190.15                80