Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 4 1.  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)
 04/03/2023   07:09:48   (  70.12,  68.70) 04/03/2023   07:10:29  (  70.13,  68.72)    1.37                41
 04/03/2023   08:00:30   ( -70.04,-123.85) 04/03/2023   07:59:59  ( -70.02,-123.81)    2.64                31
 04/05/2023   22:36:09   ( -70.96,  15.83) 04/05/2023   22:37:16  ( -70.87,  18.05)   81.56                67
 04/05/2023   23:26:37   (  70.07,-175.43) 04/05/2023   23:26:55  (  70.05,-175.51)    3.20                18
 04/06/2023   00:17:19   ( -69.98,  -7.98) 04/06/2023   00:16:24  ( -69.99,  -7.95)    2.28                55
 04/08/2023   14:52:43   ( -70.13, 132.94) 04/08/2023   14:53:53  ( -70.15, 132.87)    3.19                70
 04/08/2023   15:43:27   (  70.02, -59.59) 04/08/2023   15:43:20  (  70.03, -59.64)    2.33                 7
 04/08/2023   16:34:05   ( -69.72, 108.19) 04/08/2023   16:32:53  ( -69.76, 107.61)   22.58                72
 04/11/2023   07:09:34   ( -70.15,-111.31) 04/11/2023   07:10:17  ( -70.14,-111.24)    2.78                43
 04/11/2023   08:00:17   (  70.00,  56.24) 04/11/2023   07:59:44  (  70.02,  56.24)    3.08                33
 04/13/2023   22:35:53   (  70.81,-163.89) 04/13/2023   22:37:01  (  70.74,-162.09)   66.23                68
 04/13/2023   23:26:23   ( -70.08,   4.58) 04/13/2023   23:26:41  ( -70.09,   4.58)    0.35                18
 04/14/2023   00:17:07   (  69.98, 172.05) 04/14/2023   00:16:08  (  69.97, 172.06)    1.80                59