Nowa wersja rakiety 24.01. o 18:07 z Sriharikota wystrzelona została RN PSLV-DL (pierwszy lot wersji), która wyniosła w T+12' 47" na orbitę
o parametrach: hp=274 km, ha=274 km, i=96,57° satelitę Microsat-R, a na orbitę o parametrach: hp=450 km, ha=450 km,
i=98,77° czwarty stopień rakiety wraz z ładunkiem Kalamsat v2.
http://lk.astronautilus.pl/n190116.htm#04
Debiutancki lot PSLV-DL (24.01.2019) BY MICHAŁ MOROZ ON 26 STYCZNIA 2019
Z indyjskiego kosmodromu Sriharikota w czwartek 24 stycznia 2019 wystartowała rakieta nośna Polar Satellite Launch Vehicle z satelitami Microsat-R oraz Kalamsat v2. Był to pierwszy lot rakiety w wariancie DL.
Indyjska Agencja Kosmiczna (ISRO) rozpoczęła pierwsze prace nad PSLV jeszcze pod koniec lat siedemdziesiątych. W 1993 roku odbył się jej pierwszy lot. Od tego czasu ISRO przeprowadziła ponad 40 lotów rakiety, wynosząc m.in. takie indyjskie misje jak księżycowego orbitera Chandrayaan-1, marsjańskiego Mangalyaan czy obserwatorium Astrosat.
W pierwszym starcie rakiety kosmicznej w 2019 roku Indie umieściły na orbicie satelitę Microsat-R oraz ładunek naukowy Kalamsat v2, który pozostał przyłączony do ostatniego, czwartego stopnia rakiety nośnej. Microsat-R po blisko 13 minutach lotu został umieszczony na niskiej orbicie polarnej o parametrach 264 x 279 km i nachyleniu 96,45 stopni.
Microsat-R to mały satelita obserwacyjny o masie 740 kg. Zbudowany został przez wojskową Defence Research and Development Organization (DRDO). Edukacyjny radioamatorski eksperyment Kalamsat v2 zbudowany przez Space Kidz India trafił zaś na orbitę na wysokości 450 km i nachyleniu 98,77 stopni. Miał on działać tylko przez 15 godzin od startu i przeprowadzić testy komunikacyjne stosując sprzęt zbudowany na bazie dostępnej w sklepach elektroniki (tzw. COTS). Wcześniej podobny eksperyment zespół Space Kidz India przeprowadził na amerykańskiej rakiecie sondującej startującej z kosmodromu Wallops.
Nowy wariant rakiety oznaczony mianem PSLV-DL wyposażony jest w czwarty stopień, który w przyszłości, przy pomocy baterii jonowo-litowych, będzie mógł zasilać na dłużej przyłączone do niego eksperymenty i ładunki. W tej konfiguracji rakieta posiada tylko dwa boostery zasilane paliwem stałym.
Nagranie ze startu PSLV-DL /
Według India Times w 2019 roku Indyjska Agencja Kosmiczna planuje przeprowadzić 32 misje naukowe, w tym orbitera oraz łazika księżycowego Chandrayaan-2. Druga indyjska misja księżycowa wystartuje nie wcześniej, niż w drugim kwartale tego roku.
(Gunter’s Space Page, Loty Kosmiczne)
https://kosmonauta.net/2019/01/debiutancki-lot-pslv-dl-24-01-2019/PSLV-C44Jan 24, 2019
India's Polar Satellite Launch Vehicle (PSLV-C44) successfully injected Microsat-R and Kalamsat-V2 satellites into their designated orbits.
The PSLV-C44 lifted off at 23:37 Hrs (IST) on January 24, 2019 from the First Launch Pad at Satish Dhawan Space Centre SHAR, Sriharikota in its 46th flight.
About 13 minutes 26 seconds after lift-off, Microsat-R, an imaging satellite was successfully injected into intended orbit of 274 km.
Subsequently, the fourth stage (PS4) of the vehicle was moved to a higher circular orbit of 453 km after two restarts of the stage, to establish an orbital platform for carrying out experiments. Kalamsat-V2, a student payload, first to use PS4 as an orbital platform.
https://www.isro.gov.in/launcher/pslv-c44https://www.isro.gov.in/update/25-jan-2019/pslv-c44-successfully-launched-microsat-r-and-kalamsat-v2India debuts new version of workhorse PSLVJanuary 24, 2019 Stephen Clark
India’s Polar Satellite Launch Vehicle stands on its launch pad ahead of Thursday’s flight. Credit: ISROA new variant of India’s workhorse Polar Satellite Launch Vehicle with two strap-on solid rocket boosters and an upper stage converted into an experiment-carrying platform debuted Thursday with a launch into polar orbit.
The 145-foot-tall (44-meter) PSLV lifted off from the Satish Dhawan Space Center, located on Sriharikota Island on India’s east coast, at 1807 GMT (1:07 p.m. EST) Thursday on the first Indian space launch of 2019.
The launch occurred at 11:37 p.m. Indian Standard Time, making it a rare night launch from India’s spaceport.
The primary payload on the flight was an Indian military Earth observation satellite named Microsat-R. But a major objective of the launch was to demonstrate using the PSLV’s fourth stage as an experiment base in orbit after deploying the Microsat-R spacecraft.
On previous PSLV missions, the liquid-fueled fourth stage was deactivated after finishing its satellite deployment sequence. Most other rockets do the same, either leaving their spent rocket stages in orbit or deorbiting them to burn up in Earth’s atmosphere.
The Indian Space Research Organization, India’s national space agency, said the fourth stage on Thursday’s launch carried a payload developed by Indian students named Kalamsat. The tiny payload weighs only a couple of pounds and was planned to only be active around 15 hours after the launch before its batteries are drained, but future PSLV upper stages could include solar panels to generate electricity for longer experiment durations.
Developed by a Chennai-based organization named Space Kidz India, the Kalamsat payload uses commercial off-the-shelf computer and communications systems and will broadcast data to Earth from the PSLV upper stage. A precursor experiment from Space Kidz India launched on a NASA-sponsored suborbital sounding rocket flight to space from Wallops Island, Virginia, in 2017.
Thursday’s mission was also the first to use a new configuration of India’s Polar Satellite Launch Vehicle with two strap-on boosters. Previous PSLV flights used no boosters or flew with six motors to provide extra thrust at liftoff. (...)
This labeled illustration shows the PSLV-DL configuration with two solid rocket boosters. Credit: ISROThe new rocket configuration, named the PSLV-DL, will give Indian officials an intermediate option to fly the rocket with fewer boosters if a mission does not need the full lifting performance of six strap-on motors, a measure that adds flexibility for ISRO managers and could save money.
The PSLV’s solid rocket boosters burn around 12.2 metric tons — more than 26,000 pounds — of pre-packed solid propellant in the first 70 seconds of the flight, then jettison from the rocket’s core stage to fall into the Bay of Bengal.
Each booster stands 39 feet (12 meters) tall and measures around 3.3 feet (1 meter) in diameter, generating approximately 158,000 pounds of thrust. With two boosters supplementing the PSLV’s solid-fueled core stage, the PSLV-DL fired off the launch pad with around a million pounds of thrust.
Heading on an initial track southeast from Sriharikota, the twin boosters separated around 70 seconds after liftoff, and the PSLV’s first stage burned out and jettison at T+plus 1 minute, 49 seconds, followed immediately by ignition of the rocket’s liquid-fueled second stage. The second stage’s Vikas engine, consuming hydrazine and nitrogen tetroxide, produced around 180,000 pounds of thrust for a two-and-a-half minute burn, during which the PSLV’s payload shroud released in a clamshell-like fashion once the launcher reaches space.
After bending its trajectory toward the south to bypass an overflight of Sri Lanka, the PSLV fired its solid-fueled third stage next, followed by ignition of the twin-engine fourth stage — also burning hydrazine — at T+plus 8 minutes, 18 seconds.
The fourth stage, known as the PS4, shut down at T+plus 12 minutes, 46 seconds, and deployed the Microsat-R spacecraft at T+plus 13 minutes, 33 seconds. ISRO officials confirmed the successful deployment of Microsat-R.
The Hindu, an English-language newspaper in India, reported the Microsat-R satellite comes from the Defense Development and Research Organization — DDRO — the research and development agency of the Indian military. The roughly 1,631-pound (740-kilogram) satellite was to be deployed in an unusually-low orbit around 170 miles (274 kilometers) above Earth, the Hindu reported.
ISRO provided no details about Microsat-R in a press kit released before the launch, other than to describe it as an “imaging satellite.”
Microsat-R separated in an orbit inclined around 96.6 degrees to the equator, according to the ISRO press kit.
Two additional burns by the PS4 fourth stage engines, each programmed to last around 15 seconds, were planned approximately 54 minutes and 1 hour, 40 minutes, after liftoff to raise the rocket’s orbit to an altitude of 279 miles (450 kilometers) at an inclination of 98.8 degrees. In that orbit, the fourth stage was to begin its mission as an experiment platform with the Kalamsat payload.
Thursday’s launch marked the 46th flight of a Polar Satellite Launch Vehicle since 1993. All but two of the launches have been successful.
https://spaceflightnow.com/2019/01/24/pslv-c44-launch/https://space.skyrocket.de/doc_sdat/microsat-r.htmhttps://space.skyrocket.de/doc_sdat/kalamsat.htm
Wątek: Starty rakiet (I kwartał 2019 roku) (Przeczytany 56206 razy)