Re: Estimated Orion EFT-1 Elements

From: daryl bahls via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 3 Dec 2014 14:44:22 -0500
Here apparently is the NOTAM for the actual splashdown location

A7921/14 - PROHIBITED AREA FOR ALL ACFT FOR LAUNCH ROCKET  LATERAL LIMIT:
CIRCLE OF 20 NM RADIUS WITH CENTER IN: 23 36 36N  116 28 48W (PACIFIC OCEAN). 
MSL - UNL, 1624/1908 DLY, 04 DEC 16:24 2014 UNTIL 06 DEC 19:08 2014. 
CREATED: 03 DEC 17:14 2014
Daryl
 

-----Original Message-----
From: daryl bahls via Seesat-l <seesat-l_at_satobs.org>
To: seesat-l <seesat-l_at_satobs.org>
Sent: Wed, Dec 3, 2014 11:27 am
Subject: Re: Estimated Orion EFT-1 Elements


My estimate was in error.  

Here are the NOTAMs for Delta IV 2nd stage reentry for launches on 12/4, 12/5 
and 12/6/.


															 !CARF 12/019 (KZAK A4727/14)  ZAK AIRSPACE DCC ER OP D5911 
DELTA-IV UPPER STAGE STATIONARY ALTITUDE RESERVATION WITHIN AN AREA DEFINED AS 
3354N16206W TO 3354N16012W TO 3318N16012W TO 3318N16206W TO POINT OF ORIGIN 
SFC-UNL 1412061621-1412062203														
																																																	
														
																															
																																														 														
														
															 !CARF 12/016 (KZAK A4714/14)  ZAK AIRSPACE DCC ER OP# D5911 
DELTA-IV UPPER STAGE STATIONARY ALTITUDE RESERVATION WITHIN AN AREA DEFINED AS 
3354N16206W TO 3354N16012W TO 3318N16012W TO 3318N16206W TO POINT OF ORIGIN 
SFC-UNL 1412051616-1412052204														
														
																																			
														
																															
																																														 														
!CARF 12/007 (KZAK A4704/14)  ZAK AIRSPACE DCC ER OP# D5911 DELTA-IV UPPER STAGE 
STATIONARY ALTITUDE RESERVATION WITHIN AN AREA DEFINED AS 3354N16206W TO 
3354N16012W TO 3318N16012W TO 3318N16206W TO POINT OF ORIGIN SFC-UNL 
1412041616-1412042204																												

 
 

Daryl
"Old astrodynamicists never die, their orbits just decay."

 

 

-----Original Message-----
From: daryl bahls <bahlsd_at_aol.com>
To: seesat-l <seesat-l_at_satobs.org>
Sent: Wed, Dec 3, 2014 11:19 am
Subject: Re: Estimated Orion EFT-1 Elements


 Good point, Ron.  2nd stage entry interface is around 30.0° lat, -147.7° long.  


At that location it probably won't be visible from Hawaii, but it is just a 
little north of the great circle flight path from SF to Honolulu.  And the sun 
is below the horizon at that location for an on time launch.  

I don't have an orbit estimate for the 2nd stage reentry, but I'd estimate the 
reentry time to be around 1610 to 1615 UTC, ±5 or 10 minutes, for an on time 
launch.

 

Daryl
"Old astrodynamicists never die, their orbits just decay."

 

 

-----Original Message-----
From: ronlee--- via Seesat-l <seesat-l_at_satobs.org>
To: seesat-l <seesat-l_at_satobs.org>
Sent: Wed, Dec 3, 2014 11:09 am
Subject: Re: Estimated Orion EFT-1 Elements


The other point is that the second stage (upper stage?) should also re-enter
somewhere close. That object can be expected to breakup and have multiple
pieces burning up so that may increase the odds that something will be seen.

It would be neat to be on the aircraft that is supposed to take temperature
readings of the capsule.

Ron Lee



> At the beginning of the blackout (plasma heating starts) the vehicle will
> be visible above a 10° elevation angle for up to 350 nmi.  As it decends
> toward chute deployments of course this distance become much smaller.  It
> will be daylight during the reentry, so I'm unsure how 'visible' it will
> be.

> Daryl


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Received on Wed Dec 03 2014 - 13:44:57 UTC

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