04 August 2021
by Tony Roper
Synthetic Aperture Radar (SAR) capabilities on Sentinel-1A/B (S1A/S1B) satellites operated by the European Union's Earth Observation Program – Copernicus – have been used by open-source intelligence (OSINT) analysts since S1A was launched on 3 April 2014. S1B followed on 25 April 2016. SAR analysis has become increasingly popular because of social media and the ability to share findings easily among groups of like-minded OSINT analysts.
The data collected by the satellites can be freely accessed using several platforms such as Copernicus's own Open Data Hub, the Sentinel EO Browser, and Google Earth Engine. This open-source capability makes Sentinel more popular than other subscription-based SAR imagery providers, where the cost of obtaining data can often be outside the budget of an individual or small OSINT group.
The S1A/S1B constellation images the Earth completely every six days, and the two satellites operate 180 degrees apart. They use SAR operating on the central frequency of 5.405 GHz, which is in the C-band radio spectrum of 4–8 GHz; this is commonly known as C-SAR.
29 March 2024
by Michael Fabey
The USN CNO noted the need for the development of directed energy weapons, such as the laser system shown in this artist's rendition. (Lockheed Martin)
Recent US Navy (USN) operations in the Red Sea have underscored the importance of logistics, according to Admiral Lisa Franchetti, the USN chief of naval operations (CNO).
Adm Franchetti also noted the importance of developing new weapons and related capabilities to match emerging threats.
The CNO made the comments during a discussion for Defense One that was shown online on 27 March.
“I've focused a lot especially on contested logistics and the need to think creatively about how to resupply our ships that are out there on the pointy end,” Adm Franchetti said. “We've been able to do that.”
29 March 2024
by Akhil Kadidal
The first production Tejas Mk 1A takes off from the HAL airport in Bangalore on 28 March 2024. (HAL)
Hindustan Aeronautics Limited (HAL) has test-flown its first production Tejas Mk 1A Light Combat Aircraft (LCA). However, the Indian Air Force (IAF) is unlikely to get the aircraft until mid-2024, an industry source told Janes .
According to HAL, the first production aircraft, serial no LA-5033, conducted an 18-minute successful sortie from the HAL airport in Bengaluru on 28 March. HAL intended to deliver at least one Tejas Mk 1A to the IAF by February 2024, a deadline that was subsequently moved up to 31 March. Janes understands that the handover of LA-5033 to the IAF could possibly require at least two additional months.
An industry source told Janes that the delay in delivery is because of ongoing “disruptions in the supply chain” for the programme.
29 March 2024
by Akhil Kadidal
The Japan MoD has disclosed two airborne ELINT flights by Chinese PLA aircraft near Japanese airspace on 26 and 27 March 2024. (Japan Ministry of Defense/Janes)
A Chinese People's Liberation Army (PLA) Guizhou WZ-7 Xianglong (Soaring Dragon) unmanned aerial vehicle (UAV) was observed near Japanese airspace over the Sea of Japan (East Sea) for the first time.
This high-altitude long-endurance (HALE) UAV appeared from the direction of the “continental area” on “the morning of 26 March 2024”, the Japan Ministry of Defense (MoD) said.
A map issued by the MoD showed the WZ-7 flying a counterclockwise route over the Sea of Japan (East Sea) before turning northwest towards North Korea and Russia. The event prompted the Japan Air Self-Defense Force (JASDF) to scramble fighter aircraft from its Chūbu (Central) Air Defense Force (of the JASDF Central Area sector), according to the MoD.
The WZ-7 “circled over the Sea of Japan [East Sea],” the MoD said.
Based on the MoD's map of the incident, Janes
Synthetic Aperture Radar (SAR) capabilities on Sentinel-1A/B (S1A/S1B) satellites operated by the Eu...
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