Defence Decode®

#SSXBT – Submerged XBT, Submersible Expendable Bathythermograph by the DRDO-NPOL. It’s an underwater temperature-profiling system used by navies and submarines for oceanographic and ASW purposes. Its is a probe that Is launched into the sea, measures temperature vs depth and sends data back through a thin copper wire Temperature profiles are critical bcz sound speed in water depends on temperature, sonar performance depends on sound propagation and submarines hide in thermal layers (thermoclines) Submarine-launched variants of XBT technology has historically been export-controlled, restricted under maritime defense tech regimes

#DRDO's Gas Turbine Research Establishment is currently working towards certification of the GTX-35VS Kaveri in its 82 kN thrust class. Following certification of this baseline variant, discussions are underway to develop an upgraded Kaveri 2.0 with 85 kN+ thrust.: DR Ganesan, GTRE

#DRDO is working on a highly precise, ultra-small atomic clock employing coherent population trapping for navigation in GNSS-denied regions. It is the most accurate timekeeping device known, using the vibrations of atoms (usually cesium-133 or rubidium) as its timekeeping element instead of mechanical parts or electronic oscillators. Atoms vibrate at extremely consistent frequencies...i.e. a cesium-133 atom oscillates exactly 9,192,631,770 times per second. #AtomicClocks measure this oscillation using a microwave signal tuned to match the atom's natural frequency. This is used to define the second in the International System of Units.