Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 1.  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)
 04/01/2025   14:28:25   (  70.17, -40.86) 04/01/2025   14:29:20  (  70.18, -40.87)    0.61                55
 04/01/2025   15:19:07   ( -70.07, 126.63) 04/01/2025   15:18:50  ( -70.06, 126.60)    1.26                17
 04/01/2025   16:09:37   (  69.23, -64.84) 04/01/2025   16:08:29  (  69.29, -66.81)   77.72                68
 04/04/2025   06:45:16   (  70.13,  75.00) 04/04/2025   06:45:47  (  70.12,  74.94)    2.19                31
 04/04/2025   07:35:58   ( -70.01,-117.51) 04/04/2025   07:35:17  ( -70.01,-117.59)    2.82                41
 04/06/2025   22:11:30   ( -70.54,  22.82) 04/06/2025   22:12:41  ( -70.47,  23.68)   33.11                71
 04/06/2025   23:02:07   (  70.10,-169.17) 04/06/2025   23:02:13  (  70.08,-169.23)    2.55                 6
 04/06/2025   23:52:50   ( -70.03,  -1.75) 04/06/2025   23:51:42  ( -70.03,  -1.67)    2.98                68
 04/09/2025   14:28:14   ( -70.15, 139.22) 04/09/2025   14:29:11  ( -70.17, 139.14)    3.68                57
 04/09/2025   15:18:58   (  70.07, -53.35) 04/09/2025   15:18:38  (  70.05, -53.37)    2.26                20
 04/09/2025   16:09:28   ( -69.31, 115.08) 04/09/2025   16:08:19  ( -69.34, 113.28)   70.56                69
 04/12/2025   06:45:04   ( -70.14,-104.97) 04/12/2025   06:45:34  ( -70.15,-104.98)    2.00                30
 04/12/2025   07:35:47   (  70.01,  62.53) 04/12/2025   07:35:01  (  70.04,  62.50)    3.07                46
 04/14/2025   22:11:15   (  70.37,-156.87) 04/14/2025   22:12:26  (  70.31,-156.49)   15.92                71
 04/14/2025   23:01:54   ( -70.08,  10.89) 04/14/2025   23:01:58  ( -70.10,  10.84)    2.58                 4
 04/14/2025   23:52:37   (  69.96, 178.39) 04/14/2025   23:51:25  (  69.98, 178.31)    3.28                72