SpaceX to launch twin NASA water cycle tracker satellites
Washington, May 22: On its way to deploy five Iridium Next communications satellites on Tuesday, a SpaceX Falcon 9 rocket will also launch twin NASA satellites that will monitor Earth's water cycle, marking a unique rideshare arrangement.
The satellites are scheduled to launch at 3.47 p.m. EDT from Vandenberg Air Force Base in Central California. (This corresponds to 1.17 a.m. Wednesday India time), NASA said.
The two Gravity Recovery and Climate Experiment Follow-On mission (GRACE-FO) spacecraft will follow each other in orbit around Earth, separated by about 220 km.
On liftoff, the Falcon 9 first-stage engines will burn for approximately two minutes and 45 seconds before shutting down at main engine cutoff (MECO).
The Falcon 9's first and second stages will separate seconds later. Then, the second-stage engine will ignite for the first time (SES1) and burn until the vehicle reaches the altitude of the injection orbit, 490 km.
While this burn is going on, the payload fairing -- the launch vehicle's nose cone -- will separate into two halves like a clamshell and fall away.
When the rocket's second stage has completed its ascent to the injection orbit altitude, it will pitch down (its nose points down) 30 degrees and roll so that one of the twin GRACE-FO satellites is facing down, toward Earth, and the other is facing up, toward space.
Then the second stage engine will cut off (SECO).
About 10 minutes after liftoff, a separation system on the second stage will deploy the GRACE-FO satellites.
Separation will occur over the Pacific Ocean at about 17.5 degrees North latitude, 122.6 degrees West longitude.
The first opportunity to receive data from the spacecraft will occur at NASA's tracking station at McMurdo, Antarctica, about 23 minutes after separation, NASA said.
After the GRACE-FO satellites are deployed, the Falcon 9 second stage will coast for half an orbit before reigniting its engine (SES2) to take the Iridium Next satellites to a higher orbit for deployment.
GRACE-FO, a collaborative mission of NASA and the German Research Centre for Geosciences (GFZ), continues the work of the original GRACE mission in observing the movement of water and other mass around our planet by tracking the changing pull of gravity very precisely.
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25 killed in lightning strikes, hailstorms in several districts of Bihar
Patna, Apr 10 (PTI): At least 25 people were killed in lightning strikes and hailstorms in several districts of Bihar on Thursday, officials said.
According to a statement issued by the Chief Minister's Office (CMO), Nalanda reported 18 deaths, followed by two in Siwan, one each in Katihar, Darbhanga, Begusarai, Bhagalpur and Jehanabad.
RJD leader Tejashwi Yadav, however, claimed in a post on X that over 50 people died on Thursday.
“I am deeply saddened by the tragic deaths of more than 50 people in various incidents of storm, rain, lightning, tree and wall collapse in Bihar. I express my deepest condolences. May God provide strength to the families affected by the disaster in this hour of grief,” he wrote in Hindi.
He also said that the state government should compensate farmers for their crop loss due to the sudden rain and give them proper compensation.
Earlier, Chief Minister Nitish Kumar condoled the deaths and announced an ex gratia of Rs 4 lakh each for the next of kin of the deceased.
On Wednesday, 13 people had died in lightning strikes in four districts of Bihar.
The India Meteorological Department has issued an ‘orange alert’ (be prepared) for a number of districts, including Darbhanga, East Champaran, Gopalganj, West Champaran, Kishanganj, Araria, Supaul, Gaya, Sitamarhi, Sheohar, Nalanda, Nawada and Patna.
It has also forecast heavy rainfall on Friday and Saturday in these districts.
"Thunderstorms with lightning and gusty winds (40-50 kmph) likely to occur at few places over Madhubani, Darbhanga, East Champaran, Gopalganj, West Champaran, Kishanganj, Araria, Supaul, Gaya, Sitamarhi, Sheohar, Nalanda, Nawada, Patna," the IMD said in a bulletin.
Water-logging was also reported on Thursday from several parts of Patna following heavy rain.
The state capital recorded an average of 42.6 mm rainfall till 5.30 pm.
Officials of the Patna Municipal Corporation (PMC) and district administration, however, claimed that rainwater was drained out in the shortest possible time despite the downpour.
