Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 23.  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)
 10/23/2025   23:01:54   ( -70.08,  10.86) 10/23/2025   23:02:53  ( -70.08,  10.78)    3.03                59
 10/23/2025   23:52:39   (  69.99, 178.31) 10/23/2025   23:52:20  (  69.97, 178.28)    2.23                19
 10/24/2025   00:43:09   ( -69.30, -13.36) 10/24/2025   00:41:59  ( -69.36, -14.92)   61.36                70
 10/26/2025   15:18:45   ( -70.10, 126.63) 10/26/2025   15:19:20  ( -70.07, 126.67)    3.10                35
 10/26/2025   16:09:29   (  69.96, -65.84) 10/26/2025   16:08:47  (  69.96, -65.84)    1.03                42
 10/29/2025   06:45:00   (  70.55,  74.39) 10/29/2025   06:46:10  (  70.47,  75.50)   42.14                70
 10/29/2025   07:35:33   ( -70.02,-117.45) 10/29/2025   07:35:46  ( -70.03,-117.50)    2.59                13
 10/29/2025   08:26:18   (  69.93,  49.99) 10/29/2025   08:25:13  (  69.92,  49.99)    1.31                65
 10/31/2025   23:01:42   (  70.11,-169.13) 10/31/2025   23:02:42  (  70.11,-169.12)    0.34                60
 10/31/2025   23:52:23   ( -69.99,  -1.62) 10/31/2025   23:52:12  ( -70.01,  -1.64)    1.45                11
 11/01/2025   00:42:57   (  69.33, 166.66) 11/01/2025   00:41:48  (  69.39, 165.17)   58.81                69
 11/03/2025   15:18:31   (  70.06, -53.24) 11/03/2025   15:19:08  (  70.05, -53.31)    2.94                37
 11/03/2025   16:09:13   ( -69.98, 114.19) 11/03/2025   16:08:37  ( -70.00, 114.25)    2.91                36
 11/06/2025   06:44:48   ( -70.75,-105.86) 11/06/2025   06:45:57  ( -70.61,-104.23)   61.83                69
 11/06/2025   07:35:21   (  70.06,  62.55) 11/06/2025   07:35:32  (  70.05,  62.60)    1.95                11
 11/06/2025   08:26:02   ( -69.93,-129.93) 11/06/2025   08:25:02  ( -69.95,-129.91)    2.97                60