Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 28.  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)
 03/28/2023   22:36:17   (  70.76,-163.88) 03/28/2023   22:37:26  (  70.64,-162.30)   59.58                69
 03/28/2023   23:26:48   ( -70.10,   4.50) 03/28/2023   23:27:04  ( -70.09,   4.53)    1.52                16
 03/29/2023   00:17:32   (  69.98, 171.98) 03/29/2023   00:16:31  (  69.99, 172.03)    2.03                61
 03/31/2023   14:52:57   (  70.15, -47.12) 03/31/2023   14:54:02  (  70.17, -47.11)    2.04                65
 03/31/2023   15:43:39   ( -70.06, 120.33) 03/31/2023   15:43:32  ( -70.05, 120.36)    1.09                 7
 03/31/2023   16:34:16   (  69.57, -71.64) 03/31/2023   16:33:05  (  69.62, -72.60)   37.51                71
 04/03/2023   07:09:48   (  70.13,  68.69) 04/03/2023   07:10:29  (  70.14,  68.73)    2.17                41
 04/03/2023   08:00:30   ( -70.03,-123.85) 04/03/2023   07:59:59  ( -70.03,-123.79)    2.27                31
 04/05/2023   22:36:09   ( -70.96,  15.84) 04/05/2023   22:37:16  ( -70.89,  18.09)   82.22                67
 04/05/2023   23:26:38   (  70.07,-175.43) 04/05/2023   23:26:56  (  70.07,-175.48)    1.86                18
 04/06/2023   00:17:20   ( -69.97,  -7.97) 04/06/2023   00:16:26  ( -69.96,  -8.00)    1.13                54
 04/08/2023   14:52:44   ( -70.17, 132.88) 04/08/2023   14:53:53  ( -70.19, 132.93)    2.51                69
 04/08/2023   15:43:28   (  70.07, -59.66) 04/08/2023   15:43:20  (  70.07, -59.59)    2.64                 8
 04/08/2023   16:34:06   ( -69.76, 108.12) 04/08/2023   16:32:53  ( -69.80, 107.67)   17.93                73