Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2021   22:34:58   (   0.02,-137.22) (  -0.11,-137.68)   52.97                80
 12/31/2021   22:18:53   (   0.01,-137.22) (   0.93,-133.15)  463.92                80
 01/02/2022   10:37:58   (  -0.01,-137.21) (   0.26,-138.41)  136.43                80
 01/03/2022   10:21:52   (  -0.00,-137.20) (  -0.73,-133.86)  379.88                80
 01/04/2022   22:41:06   (   0.00,-137.19) (  -0.47,-139.16)  225.46                80
 01/05/2022   22:25:01   (   0.00,-137.18) (   0.58,-134.63)  290.69                80
 01/07/2022   10:44:06   (  -0.01,-137.17) (   0.61,-139.89)  310.27                80
 01/08/2022   10:28:00   (  -0.01,-137.16) (  -0.43,-135.36)  205.74                80
 01/09/2022   22:47:15   (   0.01,-137.15) (  -0.76,-140.66)  399.92                80
 01/10/2022   22:31:08   (   0.00,-137.14) (   0.23,-136.12)  116.00                80
 01/12/2022   10:50:13   (   0.00,-137.12) (   0.96,-141.38)  485.33                80