Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 21.  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   07:09:18   (  70.10,  68.76) 05/21/2023   07:10:02  (  70.12,  68.81)    2.94                44
 05/21/2023   07:59:59   ( -69.96,-123.72) 05/21/2023   07:59:33  ( -69.95,-123.79)    3.25                26
 05/23/2023   22:35:45   ( -71.07,  15.65) 05/23/2023   22:36:51  ( -70.93,  18.26)   95.64                66
 05/23/2023   23:26:12   (  70.06,-175.41) 05/23/2023   23:26:32  (  70.06,-175.39)    1.15                20
 05/24/2023   00:16:54   ( -69.97,  -7.97) 05/24/2023   00:16:02  ( -69.95,  -7.91)    3.33                52
 05/26/2023   14:52:23   ( -70.15, 132.91) 05/26/2023   14:53:35  ( -70.14, 132.97)    2.20                72
 05/26/2023   15:43:07   (  70.02, -59.60) 05/26/2023   15:43:02  (  70.03, -59.54)    2.46                 5
 05/26/2023   16:33:47   ( -69.83, 108.01) 05/26/2023   16:32:33  ( -69.87, 107.87)    6.98                74
 05/29/2023   07:09:17   ( -70.07,-111.21) 05/29/2023   07:10:05  ( -70.09,-111.22)    2.90                48
 05/29/2023   08:00:01   (  69.95,  56.28) 05/29/2023   07:59:32  (  69.98,  56.27)    3.48                29
 05/31/2023   22:35:45   (  70.93,-164.14) 05/31/2023   22:36:52  (  70.83,-161.87)   83.26                67
 05/31/2023   23:26:12   ( -70.05,   4.59) 05/31/2023   23:26:34  ( -70.07,   4.64)    2.87                22
 06/01/2023   00:16:56   (  69.94, 172.07) 06/01/2023   00:16:01  (  69.96, 172.12)    2.90                55
 06/03/2023   14:52:24   (  70.14, -47.10) 06/03/2023   14:53:32  (  70.12, -47.04)    3.17                68
 06/03/2023   15:43:05   ( -69.99, 120.45) 06/03/2023   15:43:02  ( -70.02, 120.45)    3.40                 3
 06/03/2023   16:33:45   (  69.67, -71.77) 06/03/2023   16:32:33  (  69.68, -72.37)   23.32                72