DocM Posted February 1, 2018 Share Posted February 1, 2018 Launch site: Vandenberg SLC-4E Launch date: February 17, 2018 Launch window: 0922 Eastern, 0622 Pacific (1422 UT) Core: B1038.2 (FormoSat-5) Stage recovery: no 3 major payloads PAZ Owner: HisdeSat (Spanish govt) Builder: Astrium España Type: X-Band synthetic aperture radar Mass: ~1,400kg Orbit: 505km sun-synchronous polar orbit MicroSat 2a and 2b Owner: SpaceX Builder: SpaceX Type: StarLink data constellation test Mass: ~386kg (each) Size: ~1.1×0.7x0.7m Solar: ~2×8m (x2) Comms: Ku-Band, laser Propulsion: Hall effect electric thrusters Orbit: 514×514km Inclination: 97.44° PAZ Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
DocM Posted February 11, 2018 Author Share Posted February 11, 2018 Link to comment Share on other sites More sharing options...
anthdci Posted February 11, 2018 Share Posted February 11, 2018 1 hour ago, DocM said: At what point will static fire be forgotten? Do planes do a static engine test before take off? Link to comment Share on other sites More sharing options...
DocM Posted February 11, 2018 Author Share Posted February 11, 2018 (edited) 47 minutes ago, anthdci said: At what point will static fire be forgotten? Do planes do a static engine test before take off? What makes you think jet pilots, or their computers, don't check the engine sensors before taking off? You can't do a static fire with solid rockets because they're single-use and the test data on one isn't transferrable to another. Many rockets do a Wet Dress Rehersal (WDR) where they fill the tanks, do a countdown and stop just before igniting the engines. This stoppage is usually because the engines can endure only a few firings, or sometimes only one. SpaceX's Merlin 1D engines are designed for many firings and reuse, both on test stands and during missions, with little refurbishment. Over 400 Merlin 1D's have flown, many have reflown, and all underwent several firings before the next launch. It's an extremely tough engine. This allows a Wet Dress Rehersal where they actually fire the engines as a final quality check before launch. They may discontinue static fires down the road, but as they say; "if it ain't broke, don't fix it." Link to comment Share on other sites More sharing options...
anthdci Posted February 12, 2018 Share Posted February 12, 2018 8 hours ago, DocM said: What makes you think jet pilots, or their computers, don't check the engine sensors before taking off? You can't do a static fire with solid rockets because they're single-use and the test data on one isn't transferrable to another. Many rockets do a Wet Dress Rehersal (WDR) where they fill the tanks, do a countdown and stop just before igniting the engines. This stoppage is usually because the engines can endure only a few firings, or sometimes only one. SpaceX's Merlin 1D engines are designed for many firings and reuse, both on test stands and during missions, with little refurbishment. Over 400 Merlin 1D's have flown, many have reflown, and all underwent several firings before the next launch. It's an extremely tough engine. This allows a Wet Dress Rehersal where they actually fire the engines as a final quality check before launch. They may discontinue static fires down the road, but as they say; "if it ain't broke, don't fix it." To be honest I was more thinking bfr. Booster goes up, comes back down to the pad. Is refilled and goes up again in the animation. No static fire between.. Link to comment Share on other sites More sharing options...
DocM Posted February 12, 2018 Author Share Posted February 12, 2018 Probably true but the full flow cycle is considered ideal for reuse, tough, and they're using low residue propellants. We'll see once the Spaceship tests start. anthdci, Unobscured Vision and Skiver 3 Share Link to comment Share on other sites More sharing options...
DocM Posted February 14, 2018 Author Share Posted February 14, 2018 (edited) SpaceX has changed the insertion altitude for MicroSat 2a and MicroSat 2b. Instead of 514x514km they'll inject to a 511x511km orbit at 97.44°. They'll then use their Hall effect plasma thrusters to raise their orbits to 1,125km. Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
Unobscured Vision Posted February 15, 2018 Share Posted February 15, 2018 I'm smelling a test of the propulsion system. See how well it really works, etc. DocM and SALSN 2 Share Link to comment Share on other sites More sharing options...
DocM Posted February 16, 2018 Author Share Posted February 16, 2018 Link to comment Share on other sites More sharing options...
DocM Posted February 16, 2018 Author Share Posted February 16, 2018 Link to comment Share on other sites More sharing options...
DocM Posted February 17, 2018 Author Share Posted February 17, 2018 Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
DocM Posted February 17, 2018 Author Share Posted February 17, 2018 (edited) 5 minute StarLink transmitter test at a Redmond, WA StarLink lab. FCC.... Quote Explanation This STA is necessary to authorize brief testing of a satellite communications transmitter in Redmond, Washington. The test itself will be under 5 minutes in duration. Purpose of Operation The brief test will utilize a directional antenna to transmit along an azimuth/elevation path from one horizon to the other. This is a final verification test of ground equipment prior to the testing performed with the experimental satellite documented in the Experimental License Application, File #0298-EX-CN-2016. Transmission will be of the 13.85 - 14 GHz commanding in said experimental license application. Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
DocM Posted February 17, 2018 Author Share Posted February 17, 2018 (edited) Hmmmm.....Fairing 2.0? Supposed to be wider (from 5.2m to 5.4m? Or more?), made longer if needed. Launch date: Feb 21st Backup launch date: Feb 22nd Launch time: 0917 EST, 0617 PST (1417 UT) Quote FOR IMMEDIATE RELEASE From: 30th Space Wing Public Affairs, www.vandenberg.af.mil Falcon 9 Paz launch delayed VANDENBERG AIR FORCE BASE, Calif. - The SpaceX Falcon 9 rocket carrying a PAZ payload from Space Launch Co lex-4, is delayed to allow for additional time to perform final checkouts of the upgraded fairing. The Falcon 9 and payload remain healthy. The launch is rescheduled for Wednesday, Feb. 21, at 6:17 a.m. PST. Link to comment Share on other sites More sharing options...
DocM Posted February 19, 2018 Author Share Posted February 19, 2018 Tidbits from the MicroSat FCC license, Quote The primary structure for the Microsat-2a and -2b test spacecraft will be a box design measuring 1.1m x 0.7m x 0.7m and carries the spacecraft flight computer, power system components, attitude determination and control components, propulsion components, GPS receiver, and broadband, telemetry, and command receivers and transmitters. The primary bus is mounted on the payload truss system, which also carries communications panels, inter-satellite optical link transmitters and receivers, star trackers, and a telemetry antenna. There are two 2x8 meter solar panels. Each demonstration spacecraft has a total mass of approximately 400kg Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
Skiver Veteran Posted February 20, 2018 Veteran Share Posted February 20, 2018 Link to comment Share on other sites More sharing options...
DocM Posted February 20, 2018 Author Share Posted February 20, 2018 (edited) Hispasat 30W-6 ≠ HisdeSat PAZ Belongs here Edited February 20, 2018 by DocM Link to comment Share on other sites More sharing options...
Beittil Posted February 20, 2018 Share Posted February 20, 2018 (edited) We could easily consolidate launch topics into a format l where every launch doesn't have its own topic. It is not exactly NSF here in levels of reactions and viewing And with launch cadence in the elevator going up... Might as well just do something like: SpaceX west coast launches SpaceX east coast launches SpaceX general topic Link to comment Share on other sites More sharing options...
DocM Posted February 20, 2018 Author Share Posted February 20, 2018 (edited) SpaceX General could remain the Updates thread. 6 of one.... I was thinking West/East/Boca Chica threads soon - in H2 2018 it's gonna be rapid fire, then get faster as StarLink and BFR tests ramp up. How about starting them with the first Block 5 mission? Beittil 1 Share Link to comment Share on other sites More sharing options...
DocM Posted February 20, 2018 Author Share Posted February 20, 2018 (edited) Rolled out and upright for tomorrows launch. Weather 90% Edited February 20, 2018 by DocM Link to comment Share on other sites More sharing options...
Skiver Veteran Posted February 21, 2018 Veteran Share Posted February 21, 2018 15 hours ago, Skiver said: The second line of that is referring to this launch, no? bguy_1986 1 Share Link to comment Share on other sites More sharing options...
DocM Posted February 21, 2018 Author Share Posted February 21, 2018 RP-1 loading Link to comment Share on other sites More sharing options...
DocM Posted February 21, 2018 Author Share Posted February 21, 2018 LOX load Link to comment Share on other sites More sharing options...
DocM Posted February 21, 2018 Author Share Posted February 21, 2018 Link to comment Share on other sites More sharing options...
Skiver Veteran Posted February 21, 2018 Veteran Share Posted February 21, 2018 I understand they are moving on to block 5 so there's no real reusability with the first stage here and therefore they aren't recovering but is there a reason why they don't just do it anyway? I know they're pretty successful on recovery now but surely it can still present an opportunity to learn? I assume it's a purely financial decision, in that it costs more to recover? Link to comment Share on other sites More sharing options...
DocM Posted February 21, 2018 Author Share Posted February 21, 2018 Scrubbed - upper level winds They're going to do another high-G 3 engine water touchdown test like with GovSat-1. No need to keep the old cores with Block 5 so close. Link to comment Share on other sites More sharing options...
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