Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 10 23.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 10/25/2023   15:42:39   ( -70.66, 119.38) 10/25/2023   15:43:48  ( -70.55, 121.16)   66.98                69
 10/25/2023   16:33:11   (  69.91, -72.14) 10/25/2023   16:33:25  (  69.90, -72.14)    1.97                14
 10/25/2023   17:23:52   ( -69.77,  95.39) 10/25/2023   17:22:55  ( -69.79,  95.35)    2.90                57
 10/28/2023   07:59:25   ( -69.99,-123.81) 10/28/2023   08:00:27  ( -70.00,-123.76)    2.39                62
 10/28/2023   08:50:09   (  69.87,  43.67) 10/28/2023   08:49:54  (  69.89,  43.73)    3.04                15
 10/28/2023   09:40:42   ( -69.30,-148.18) 10/28/2023   09:39:32  ( -69.34,-149.38)   47.42                70
 10/31/2023   00:16:24   ( -69.95,  -8.01) 10/31/2023   00:16:57  ( -69.96,  -7.93)    2.93                33
 10/31/2023   01:07:07   (  69.79, 159.55) 10/31/2023   01:06:25  (  69.79, 159.48)    2.88                42
 11/02/2023   15:42:44   (  70.19, -59.94) 11/02/2023   15:43:55  (  70.10, -59.49)   19.83                71
 11/02/2023   16:33:22   ( -69.88, 107.86) 11/02/2023   16:33:27  ( -69.89, 107.85)    1.48                 5
 11/02/2023   17:24:06   (  69.77, -84.67) 11/02/2023   17:22:54  (  69.77, -84.67)    0.25                72
 11/05/2023   07:59:38   (  69.92,  56.23) 11/05/2023   08:00:26  (  69.93,  56.16)    2.91                48
 11/05/2023   08:50:20   ( -69.81,-136.29) 11/05/2023   08:49:56  ( -69.83,-136.34)    3.07                24