Author Topic: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09  (Read 136232 times)

Offline gladiator1332

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #180 on: 01/15/2009 05:07 PM »
Darn. Oh well, I remember enduring months of scrubs for the first D4H launch.

Offline Chris Bergin

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #181 on: 01/15/2009 05:24 PM »
This doesn't sound too hopeful for a 24 hour turnaround:

"Hi, official release is coming.  Managers will meet later tonight to pick a new launch date.  Along with valve issue still being worked, bad weather has entered the equation.  More to come. Mike.

Offline Chris Bergin

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #182 on: 01/15/2009 06:13 PM »
Good afternoon, here is the official statement for today’s delay.  The plan is to put out another statement later this evening after mission managers meet.

FOR REMOTE CAMERA PHOTOGRAPHERS:  We will adjust cameras on launch day, whatever day that turns out to be.  Meet at the CCAFS front gate at 0900 on launch day for escort. Thanks, Mike

 

Launch of Delta IV Heavy Postponed, New Launch Date to be Determined

Cape Canaveral Air Force Station, FL, (Jan. 15, 2009) – Mission managers have decided to postpone today’s launch of a United Launch Alliance Delta IV Heavy with a National Reconnaissance Office payload for two reasons.  First, work continues to resolve a gaseous nitrogen valve issue within the launch pad ground support equipment.   The very dry gaseous nitrogen is used to evacuate the air from various compartments in the launch vehicle whenever cryogenic propellants are loaded, because the extremely cold temperatures of the propellants would cause water in the air to condense.   Second, there is a probability that increasing winds due to an approaching cold front would violate vehicle exposure criteria tonight.  The Mobile Service Tower is being rolled back into position around the Delta IV Heavy this afternoon. Mission managers will convene this evening to determine the date for the next launch attempt. More information on a launch date and time will be released when available.

 

Michael J. Rein

ULA Communications


Offline marsavian

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #183 on: 01/15/2009 07:54 PM »
This is the biggest operational minus against using D-IVH as a time-critical CLV, it is such a hanger queen !
« Last Edit: 01/15/2009 07:54 PM by marsavian »

Offline William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #184 on: 01/15/2009 08:30 PM »
Next attempt will be on Saturday (Friday EST), according to MSDB.

Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #185 on: 01/15/2009 08:32 PM »
This is nothing. I remember the first few launches where there would be hold after hold as things went wrong with the vehicles - battery voltages, pressures, temps, actuators. The later ones seem to be quite a bit cleaner in that regard - there was only one non-weather hold in the past 4 flights.
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Offline William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #186 on: 01/15/2009 08:48 PM »
there was only one non-weather hold in the past 4 flights.

I make it three. GOES-N scrubbed twice due to technical issues, and there was a short hold in the DSP-23 countdown, but this was resolved within the window.

Of course, that's not counting delays before the start of the countdown. This launch is already over three years behind schedule, and there hasn't been a Delta IV flight since 2007. Only one Delta IV has launched within a year of its scheduled launch date.
« Last Edit: 01/15/2009 08:50 PM by GW_Simulations »

Offline gladiator1332

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #187 on: 01/15/2009 09:02 PM »
I'd rather see them scrub than launch with a known issue and fail.
« Last Edit: 01/15/2009 09:02 PM by gladiator1332 »

Offline DfwRevolution

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #188 on: 01/15/2009 09:07 PM »
Can some of these technical issues be attributed to the Delta IV's low flight rate?

Offline kch

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #189 on: 01/15/2009 09:27 PM »
I'd rather see them scrub than launch with a known issue and fail.

Much rather -- fix it, *then* fly it!

Offline yinzer

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #190 on: 01/15/2009 09:40 PM »
Can some of these technical issues be attributed to the Delta IV's low flight rate?

Either the low flight rate, or the currently low total number of flights.

This is the 3rd Delta-IV Heavy launch, and the 7th launch from SLC-37.
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Offline Chris Bergin

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #191 on: 01/15/2009 10:38 PM »
ULA PAO:

Delta IV Heavy Launch Rescheduled for Jan. 17

Cape Canaveral Air Force Station, FL, (Jan. 15, 2009) – The launch of a United Launch Alliance Delta IV Heavy with a National Reconnaissance Office payload has been rescheduled for Jan. 17, 7:33 p.m. EST.  The primary reason for rescheduling the launch on Saturday is the current weather forecast. The forecast for Friday predicts a 70 percent chance of high winds exceeding both Mobile Service Tower roll and launch criteria.  The forecast Saturday significantly improves to only a 20 percent chance of weather violating launch criteria. Concerning the gaseous nitrogen valve issue associated with the launch pad ground support equipment, mission managers state the valve will be fully repaired and mission capable to support this launch attempt.

Offline kevin-rf

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #192 on: 01/16/2009 12:33 AM »

Since it has now been moved to saturday anyone willing to hazard a guess based upon prior GSO flights how long after launch the third and final circularization burn will be if this is a GSO mission and if the third burn will be visible for us in north america?

Pile on enough warm layers and it would be great to sit up early sunday morning and see if one can catch it.
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Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 16, 09
« Reply #193 on: 01/16/2009 12:44 AM »
there was only one non-weather hold in the past 4 flights.

I make it three. GOES-N scrubbed twice due to technical issues, and there was a short hold in the DSP-23 countdown, but this was resolved within the window.

Of course, that's not counting delays before the start of the countdown. This launch is already over three years behind schedule, and there hasn't been a Delta IV flight since 2007. Only one Delta IV has launched within a year of its scheduled launch date.

I'm pretty sure GOES-N launched without any unplanned holds in the 2006 attempt. I don't count the 2005 scrubs. The DSP was the hold I was talking about, and I'm not even sure it was a vehicle issue (they said it was "data monitoring for composite ramp temps" which has to do with the PAF)

As for your other point, I already made a big long post about how if one launch is delayed, they all will be even if the next vehicles in the pipeline are clean in the DSP thread. I count the "scheduled" launch date as that announced around or after the last flight went off. It is unreasonable to (for example) expect them to launch one scheduled for June 7 when the previous one hasn't even gotten off the pad yet as of June 9!

Look at the NROL-22 launch. It took them a long time to prep that one for flight and that delayed the next flight (DMSP) for a while even though that vehicle was relatively clean and was only delayed about a month from the date announced after the NRO flight. There was NO way they could make DMSP fly any earlier when NROL hadn't flown. The flight order can't change and if one launch is delayed it will affect the rest even if there are no problems with the rest of them.

Therefore I count the original launch date (and thus the lateness of this flight) as whatever date was announced near or after DSP-23.
« Last Edit: 01/16/2009 12:51 AM by Nick L. »
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Offline parham55

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #194 on: 01/16/2009 03:23 AM »
I've never seen a launch of any kind and I happen to be in Orlando.  Will I be able to see much of anything?  Thanks.

Offline SEDS-UCF

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #195 on: 01/16/2009 03:32 AM »
I've never seen a launch of any kind and I happen to be in Orlando.  Will I be able to see much of anything?  Thanks.

Yes, you should definitely be able to see it real well from anywhere near Orlando (further east the better).  Even by Disney, you can still see a nice size light in the sky.  Though, it all depends on the cloud cover.
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Offline kraisee

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #196 on: 01/16/2009 04:54 AM »
I've never seen a launch of any kind and I happen to be in Orlando.  Will I be able to see much of anything?  Thanks.

If you have a car, you can get a really good view of the Pad from the *second* SR-528 causeway just as you enter Port Canaveral (check Google maps) roughly an hour down the road from where you are.   There will be hundreds of other spectators so you won't miss the crowd :)

You could spend the day at the Space Center and see all the sites there.

And the beach area is a nice place to visit anyway -- at least on warmer days than today!!! :)

Ross.
« Last Edit: 01/16/2009 04:56 AM by kraisee »
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Offline parham55

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #197 on: 01/16/2009 11:26 AM »
I'd love to be able to head East to the Space Center but I'm in a trade show all weekend.  I'm just very pleased I have NSF.com to keep me up to date on when I need to step outside and search the sky.  Thanks everyone!

Offline Chris Bergin

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #198 on: 01/16/2009 01:20 PM »
NEW Satellite coordinates for Saturday ULA Delta IV NRO launch

 

Test signals 6:45 PM ET – 7:07 PM ET

Broadcast start 7:07 PM ET

 

Carrier: INTELSAT

Satellite: GALAXY 3C

Transponder - GALAXY 3C-04

Orbital Position: 95 DEGREES WEST

Band: C

Bandwidth: 36.00 MHZ

Downlink Frequency: 3780 MHz (Vertical)

 

NOTE: SPLIT AUDIO

Complete Broadcast Audio on 6.8 MHz subcarrier (Right Channel Audio)

Rocket Blast-off / PAD ONLY audio 6.2  MHz subcarrier (Left Channel Audio)

Offline Ronsmytheiii

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #199 on: 01/16/2009 01:24 PM »
I've never seen a launch of any kind and I happen to be in Orlando.  Will I be able to see much of anything?  Thanks.

If you have a car, you can get a really good view of the Pad from the *second* SR-528 causeway just as you enter Port Canaveral (check Google maps) roughly an hour down the road from where you are.   There will be hundreds of other spectators so you won't miss the crowd :)

You could spend the day at the Space Center and see all the sites there.

And the beach area is a nice place to visit anyway -- at least on warmer days than today!!! :)

Ross.

With shuttle launches one can see all up and down the east coast, would that be possible for Delta IV?  I am in Virginia Beach right now, so was wondering if I could briefly glance her going by if the weather is right....
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