Thursday , December 3 2020

SpaceX, to close in 2018 with the GPS III and the first contract for US national security mission – NASASpaceFlight.com



SpaceX set to cap a great year with the launch of 21 long-awaited first US mission to the national security of the company. The launch of the spacecraft GPS III-SV01 mark the first competitively awarded SpaceX in EELV, Evolved Expendable Launch Vehicle, a contract with the US Air Force and a & # 39 is the first of a new generation of GPS III satellites for launch.

The launch window overlooks the Tuesday, December 18 from 09:11 – 9:35 EST (1411 – 1435 UTC). The mission will use a brand new Falcon 9 Block 5 missiles flying in its long-term configuration, since the full implementation of the Falcon 9 is necessary attic GPS III satellite in its orbit in medium.

GPS III Award of contract (a):

The prize for the first GPS III satellite contract goes back to the day when the current Global Positioning System (GPS) has reached full operational capability July 17, 1995.

While the original objectives of GPS were performed on the same day, major advances in technology and user requirements on the newly completed system led to an attempt to modernize GPS.

This initiative has received full support from the White House and President Bill Clinton's administration in 1998, which initiated the GPS III program in conjunction with the official permission of the US Congress in 2000 N.

Under the chairmanship of George W. Bush, GPS III system itself, they were studied technologies that will be included in the satellites, as well as the overall design of the spacecraft that led to a contract remuneration for construction works at Lockheed Martin, AKA with Orbital and Northrop Grumman Astro Aerospace software satellite parts.

Under the assembly contract, Lockheed Martin was premerskoe & # 39; ep manufacturer and provided that A2100 bus structure for satellites. Moreover, TCI Orbital now Northrop Grumman innovative systems, provided that the aerosol and pressure tanks, and Northrop Grumman Aerospace Astro provided that eight jib deployable antennas.

Under the administration of President Barack Obama, the contract the next generation of operational management system GPS Raytheon was sentenced February 25, 2010, to build a ground control system for GPS III of satellites.

The first GPS III satellite was originally launched in 2014 and had to be taken into orbit aboard a rocket United Launch Alliance (ULA) Delta IV M +, but delayed due to the late technology and build supply pushed that first launch in the spring of 2018.

launch contract for the first GPS III mission ULA was sentenced in January 2012.

Global Positioning System Directorate signs. (US Air Force)

However, after that the first contract was signed on the ULA, SpaceX and Air Force have reached an agreement in 2015 to release their claim against Air Force on an agreement for SpaceX that the Air Force will open the launch of national security contracts to competitive bidding.

The lawsuit followed SpaceX award, separately from the line of GPS III satellites, to ULA from the US government to block the purchase of 36 ULA launches without competition from outside sources in 2013.

In 2014 SpaceX sued the Air Force in an attempt to compete on the market launch, instead of relying solely on the entrance block contracts which are considered as SpaceX more expensive than the single missions waiting for contracts.

Later that same year, after the lawsuit was dropped, followed by the Air Force on his promise and publicly requested a fixed price contract proposal to launch a second GPS III satellite.

Competitive bid was submitted as part of the BBC program Evolved Expendable Launch Vehicle (EELV) – The «Expendable» part of which is a & # 39 is a relic of the era of complete disposability missiles. Falcon # 9 & 39 is part EELV program even if it is able to be recovered and reused.

With the competitive nature of the contract, SpaceX has filed an application with the help of the Falcon 9 and ULA has decided not to submit an application referring to concerns about how the BBC will choose the winner, as well as fears that they would not be able to meet the minimum SpaceX launch costs.

On April 26, 2016, the Air Force officially announced the selection of SpaceX, to start the second GPS III satellite.

Since then, third, fourth, fifth, sixth and GPS III satellites passed the bids, with the launch of SpaceX winning all of them with their Falcon 9 rocket.

GPS III satellites swap the order of flight and launch:

While SpaceX was awarded a contract on the GPS III satellites for the second series, he was slated to be the second launch of the satellite GPS III after the first satellites launched on the Delta IV M + ULA rockets into.

However, one year after the conclusion of the contract, the Air Force announced the launch order of swap for the two missions of spring 2017, taking GPS III SV01 (first spacecraft) of the ULA Delta IV M + and placing it on the Falcon 9, taking GPS-III, SV -02 (second spacecraft, and one SpaceX rate actually) from the Falcon 9 and its placement on the ULA Delta IV M +.

Rearrange the rocket, which will launch the first two satellites have no effect on contracts with a fixed price, awarded the two companies, but he did SpaceX decisive hand – and another – first: SpaceX company will now have to launch the first in a new generation of GPS satellites, and not the second.

Due to swap the order of the cargo rocket, SpaceX mission – during the launch of the first satellite GPS III – it is the second voyage contract; thus, the Air Force and SpaceX mission patch referring to it as GPS III-2 while it is, in fact, the first GPS III satellite (SV01) was built.

Ground tests to check for the GPS III-SV01 was successfully completed during 2017, and updates to the launch of SpaceX manifesto launch mission brought into alignment on December 2018.

Within a few weeks before the launch, SpaceX and Air Force have successfully completed the integration of GPS III SV-01 on the payload adapter, and encapsulation Falcon 9 fairing.

Like the previous mission SpaceX, Falcon 9 static fire was successfully completed – with an overview of the data look – just after midnight on 14 December.

Unlike most of the SpaceX mission, the final for the launch of the company also included a full-blown Mission Rehearsal – where the launch and management of useful team worked through the entire flight scenario, including questions thrown at them to make sure they are ready for any eventuality on launch day .

GPS III-SV01 is encapsulated inside the fairing Falcon 9 in early December 2018. (Photo: Lockheed Martin)

With the obstacles scattered, the mission continued its readiness to launch the review (LRR), which SpaceX and Air Force, which occurred together on Monday, 17 December. LRR made with permission to begin launch operations, and Falcon 9 rolled on its launch pad at SLC-40 at Cape Canaveral Air Force Station, Florida, on Monday afternoon.

If all goes according to plan, the rocket Falcon 9 will come off from the seaside launch pad at Cape Canaveral in the window run 24 minutes, which extends from 9:11 – 9:35 EST (1411-1435 UTC) on Tuesday, December 18, 2018,

Reserve possibility exists on Wednesday, December 19.

After lifting off, the Falcon 9 will pitch and slope distance north-east of Cape put the GPS III-SV01 in 55 ° inclination orbit.

Falcon 9 for this mission will use the first main stage B1054, a completely new block 5 of the first stage in accordance with the requirements of a fixed price contract with the Air Force.

Since each pound of thrust performance from Falcon 9 is required to obtain 3880 kg (8533 pounds) GPS III satellite in its orbit in medium, B1054 will fly in the long configuration, without legs planting and without a grid of ribs and being recycled into the Atlantic ocean after being separated from the second degree.

Mission patch for GPS III-SV01 (2nd GPS III launch contract – hence the "2" on a patch of mission (credit :. SpaceX)

Mission Timeline Falcon 9 for GPS III-SV01 with & # 39 is:

Time Hr / Min / Sec flight events
-00: 00: 03 Command engine misfire
12:00:00 Falcon 9 Liftoff
12:01:04 Max Q (time of maximum stress on Falcon 9)
12:02:44 1st stage main engine exception
12:02:48 The first phase / second phase separation
12:02:50 2nd stage engine ignition
12:03:22 fairing deployment
12:08:16 The second stage of the engine 1 Cut Off (SECO 1) -[Orbit is LEO x 4,000 km]
1:08:51 2nd stage engine ignition
1:09:37 The second motor step 2 Cut Off (SECO 2) – [Orbit is 4,000 km x 20,000 km]
1:56:17 the deployment of GPS III-SV01
6:30:00 Step 2 destructive descent decayed after burn


Source link