Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2021   06:00:08   (   0.13,-127.85) (   0.18,-127.70)   18.54                80
 12/22/2021   18:21:39   (  -0.12,-127.91) (   0.83,-132.26)  495.15                80
 12/23/2021   17:58:20   (  -0.12,-127.94) (  -0.30,-127.27)   77.19                80
 12/25/2021   06:19:59   (   0.10,-127.97) (  -0.75,-131.85)  441.96                80
 12/26/2021   05:56:39   (   0.11,-128.00) (   0.38,-126.86)  129.95                80
 12/27/2021   18:18:10   (  -0.10,-128.04) (   0.68,-131.41)  384.52                80
 12/28/2021   17:54:50   (  -0.11,-128.07) (  -0.45,-126.42)  187.20                80
 12/30/2021   06:16:30   (   0.09,-128.10) (  -0.53,-131.02)  332.99                80
 12/31/2021   05:53:10   (   0.10,-128.12) (   0.54,-126.02)  238.02                80
 01/01/2022   18:14:41   (  -0.09,-128.14) (   0.45,-130.59)  278.09                80
 01/02/2022   17:51:22   (  -0.09,-128.16) (  -0.69,-125.60)  292.71                80