Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 22.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/24/2021   15:50:50   (  69.73, -60.91) 07/24/2021   15:51:56  (  69.65, -58.52)   92.80                66
 07/24/2021   16:41:14   ( -68.69, 107.86) 07/24/2021   16:41:41  ( -68.70, 107.89)    1.96                27
 07/24/2021   17:31:58   (  68.56, -84.65) 07/24/2021   17:31:09  (  68.54, -84.67)    2.22                49
 07/27/2021   08:07:28   (  68.76,  56.21) 07/27/2021   08:08:38  (  68.75,  56.19)    1.66                70
 07/27/2021   08:58:09   ( -68.63,-136.29) 07/27/2021   08:58:08  ( -68.64,-136.31)    1.67                 1
 07/27/2021   09:48:50   (  68.34,  31.40) 07/27/2021   09:47:37  (  68.42,  31.06)   16.41                73
 07/30/2021   00:24:24   (  68.71, 172.05) 07/30/2021   00:25:05  (  68.74, 172.05)    3.43                41
 07/30/2021   01:15:05   ( -68.57, -20.45) 07/30/2021   01:14:36  ( -68.58, -20.51)    2.68                29
 08/01/2021   15:50:48   ( -69.41, 119.53) 08/01/2021   15:51:57  ( -69.28, 120.98)   58.69                69
 08/01/2021   16:41:20   (  68.65, -72.11) 08/01/2021   16:41:33  (  68.66, -72.16)    2.63                13
 08/01/2021   17:32:02   ( -68.56,  95.33) 08/01/2021   17:31:03  ( -68.56,  95.35)    1.03                59
 08/04/2021   08:07:33   ( -68.77,-123.81) 08/04/2021   08:08:33  ( -68.77,-123.80)    0.59                60
 08/04/2021   08:58:17   (  68.65,  43.66) 08/04/2021   08:58:00  (  68.64,  43.69)    1.38                17
 08/04/2021   09:48:49   ( -68.02,-148.21) 08/04/2021   09:47:38  ( -68.10,-149.33)   47.13                71