Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 19.  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)
 05/21/2023   07:09:17   (  70.07,  68.81) 05/21/2023   07:10:02  (  70.09,  68.78)    3.09                45
 05/21/2023   07:59:59   ( -69.99,-123.75) 05/21/2023   07:59:32  ( -69.98,-123.74)    0.47                27
 05/23/2023   22:35:45   ( -71.03,  15.71) 05/23/2023   22:36:51  ( -70.98,  18.33)   95.00                66
 05/23/2023   23:26:13   (  70.07,-175.44) 05/23/2023   23:26:33  (  70.05,-175.40)    2.90                20
 05/24/2023   00:16:54   ( -69.94,  -7.91) 05/24/2023   00:16:03  ( -69.95,  -7.92)    0.93                51
 05/26/2023   14:52:24   ( -70.15, 132.90) 05/26/2023   14:53:36  ( -70.15, 132.98)    3.08                72
 05/26/2023   15:43:07   (  69.98, -59.53) 05/26/2023   15:43:04  (  69.99, -59.61)    3.05                 3
 05/26/2023   16:33:48   ( -69.84, 108.00) 05/26/2023   16:32:34  ( -69.88, 107.88)    6.69                74
 05/29/2023   07:09:17   ( -70.06,-111.20) 05/29/2023   07:10:06  ( -70.07,-111.26)    2.54                49
 05/29/2023   08:00:01   (  69.94,  56.29) 05/29/2023   07:59:33  (  69.96,  56.23)    2.54                28
 05/31/2023   22:35:46   (  70.96,-164.19) 05/31/2023   22:36:52  (  70.89,-161.79)   87.69                66
 05/31/2023   23:26:12   ( -70.03,   4.62) 05/31/2023   23:26:36  ( -70.02,   4.56)    2.36                24
 06/01/2023   00:16:56   (  69.91, 172.10) 06/01/2023   00:16:03  (  69.91, 172.04)    2.30                53