Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/28/2021   22:33:41   (   0.04,-137.24) (  -0.04,-137.59)   39.88                80
 01/29/2021   22:17:36   (   0.04,-137.24) (   0.99,-133.06)  476.52                80
 01/31/2021   10:39:23   (  -0.03,-137.24) (   0.22,-138.32)  123.76                80
 02/01/2021   10:17:59   (  -0.03,-137.24) (  -0.80,-133.79)  392.15                80
 02/02/2021   22:39:55   (   0.03,-137.22) (  -0.38,-139.10)  213.82                80
 02/03/2021   22:23:51   (   0.03,-137.21) (   0.64,-134.57)  301.83                80
 02/05/2021   10:45:38   (  -0.03,-137.21) (   0.57,-139.83)  299.51                80
 02/06/2021   10:24:14   (  -0.03,-137.19) (  -0.45,-135.30)  215.57                80
 02/07/2021   22:46:09   (   0.01,-137.16) (  -0.78,-140.60)  391.75                80
 02/08/2021   22:30:04   (  -0.00,-137.15) (   0.24,-136.07)  123.24                80
 02/10/2021   10:51:52   (   0.01,-137.13) (   0.98,-141.33)  479.04                80