Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 6 12.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/12/2021   22:25:04   (  70.72,-158.99) 06/12/2021   22:23:55  (  70.78,-160.79)   66.59                69
 06/12/2021   23:14:44   ( -70.05,   7.67) 06/12/2021   23:14:25  ( -70.06,   7.68)    0.56                19
 06/13/2021   00:04:11   (  69.96, 175.18) 06/13/2021   00:05:09  (  69.94, 175.16)    1.56                58
 06/15/2021   14:41:44   (  70.11, -44.00) 06/15/2021   14:40:38  (  70.11, -43.95)    1.98                66
 06/15/2021   15:31:14   ( -70.00, 123.47) 06/15/2021   15:31:20  ( -70.01, 123.52)    1.97                 6
 06/15/2021   16:20:47   (  69.57, -69.48) 06/15/2021   16:21:57  (  69.53, -68.46)   39.87                70
 06/18/2021   06:58:14   (  70.11,  71.87) 06/18/2021   06:57:35  (  70.12,  71.80)    2.98                39
 06/18/2021   07:47:44   ( -70.00,-120.65) 06/18/2021   07:48:16  ( -69.96,-120.65)    3.59                32
 06/20/2021   22:25:07   ( -70.75,  21.06) 06/20/2021   22:23:58  ( -70.76,  19.24)   66.63                69
 06/20/2021   23:14:45   (  70.04,-172.34) 06/20/2021   23:14:30  (  70.02,-172.29)    2.62                15
 06/21/2021   00:04:15   ( -69.93,  -4.85) 06/21/2021   00:05:12  ( -69.92,  -4.82)    1.98                57
 06/23/2021   14:41:48   ( -70.14, 136.03) 06/23/2021   14:40:43  ( -70.14, 135.99)    1.92                65
 06/23/2021   15:31:15   (  70.03, -56.48) 06/23/2021   15:31:27  (  70.04, -56.55)    3.04                12
 06/23/2021   16:20:51   ( -69.59, 110.56) 06/23/2021   16:22:02  ( -69.57, 111.48)   35.86                71