Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 3 27.  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   22:36:18   (  70.78,-163.90) 03/28/2023   22:37:26  (  70.68,-162.23)   61.99                68
 03/28/2023   23:26:48   ( -70.06,   4.56) 03/28/2023   23:27:05  ( -70.07,   4.51)    2.61                17
 03/29/2023   00:17:32   (  69.94, 172.04) 03/29/2023   00:16:32  (  69.97, 172.01)    3.18                60
 03/31/2023   14:52:57   (  70.16, -47.15) 03/31/2023   14:54:02  (  70.15, -47.14)    1.88                65
 03/31/2023   15:43:38   ( -70.02, 120.39) 03/31/2023   15:43:32  ( -70.04, 120.34)    2.68                 6
 03/31/2023   16:34:16   (  69.59, -71.66) 03/31/2023   16:33:05  (  69.60, -72.62)   37.18                71
 04/03/2023   07:09:47   (  70.09,  68.74) 04/03/2023   07:10:29  (  70.12,  68.70)    3.11                42
 04/03/2023   08:00:29   ( -70.00,-123.80) 04/03/2023   07:59:59  ( -70.01,-123.82)    1.28                30
 04/05/2023   22:36:09   ( -70.98,  15.80) 04/05/2023   22:37:16  ( -70.87,  18.05)   82.83                67
 04/05/2023   23:26:38   (  70.09,-175.47) 04/05/2023   23:26:55  (  70.10,-175.44)    1.44                17
 04/06/2023   00:17:20   ( -69.99,  -8.01) 04/06/2023   00:16:25  ( -69.99,  -7.96)    1.98                55
 04/08/2023   14:52:44   ( -70.15, 132.91) 04/08/2023   14:53:54  ( -70.15, 132.88)    1.18                70
 04/08/2023   15:43:28   (  70.05, -59.62) 04/08/2023   15:43:21  (  70.03, -59.64)    1.87                 7
 04/08/2023   16:34:06   ( -69.74, 108.16) 04/08/2023   16:32:53  ( -69.82, 107.70)   19.81                73