Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 28.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2023   06:44:41   (  70.64,  74.22) 03/30/2023   06:45:50  (  70.52,  75.50)   49.29                69
 03/30/2023   07:35:14   ( -70.07,-117.58) 03/30/2023   07:35:26  ( -70.07,-117.51)    2.74                12
 03/30/2023   08:25:57   (  69.91,  49.98) 03/30/2023   08:24:54  (  69.91,  49.91)    2.68                63
 04/01/2023   23:01:22   (  70.13,-169.21) 04/01/2023   23:02:20  (  70.13,-169.17)    1.75                58
 04/01/2023   23:52:03   ( -69.99,  -1.68) 04/01/2023   23:51:50  ( -70.01,  -1.70)    2.40                13
 04/02/2023   00:42:36   (  69.30, 166.65) 04/02/2023   00:41:27  (  69.35, 165.04)   63.38                69
 04/04/2023   15:18:12   (  70.07, -53.33) 04/04/2023   15:18:44  (  70.07, -53.35)    1.00                32
 04/04/2023   16:08:54   ( -69.98, 114.13) 04/04/2023   16:08:14  ( -69.96, 114.13)    1.56                40
 04/07/2023   06:44:25   ( -70.49,-105.51) 04/07/2023   06:45:36  ( -70.36,-104.67)   33.97                71
 04/07/2023   07:35:02   (  70.01,  62.54) 04/07/2023   07:35:07  (  70.03,  62.50)    2.35                 5
 04/07/2023   08:25:44   ( -69.92,-130.00) 04/07/2023   08:24:37  ( -69.92,-130.03)    0.87                67
 04/09/2023   23:01:09   ( -70.13,  10.83) 04/09/2023   23:02:02  ( -70.11,  10.87)    2.35                53
 04/09/2023   23:51:52   (  69.98, 178.38) 04/09/2023   23:51:29  (  70.00, 178.35)    2.55                23