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Greenhouse Gases Observing Satellite (GOSAT), also known as Ibuki (Japanese: いぶき, Hepburn: Ibuki, meaning "breath" [4]), is an Earth observation satellite and the world's first satellite dedicated to greenhouse gas monitoring. [5] It measures the densities of carbon dioxide and methane from 56,000 locations on the Earth's atmosphere. [6]
The Greenhouse Gases Observing Satellite-2 (GOSAT-2), also known as Ibuki-2 (Japanese: いぶき2号, Hepburn: Ibuki nigō), is an Earth observation satellite dedicated to greenhouse gas monitoring. It is a successor of Greenhouse Gases Observing Satellite (GOSAT).
The principle of laser-interferometric inter-satellite ranging measurements was successfully implemented in the Laser Ranging Interferometer onboard GRACE Follow-On. [ 32 ] Unlike terrestrial gravitational-wave observatories, LISA cannot keep its arms "locked" in position at a fixed length.
Gravitational wave events are named starting with the prefix GW, while observations that trigger an event alert but have not (yet) been confirmed are named starting with the prefix S. [8] Six digits then indicate the date of the event, with the two first digits representing the year, the two middle digits the month and two final digits the day ...
The typical reference design for the individual satellite is in the 1-10 GW range and usually involves planar or concentrated solar photovoltaics (PV) as the energy collector / conversion. The most typical transmission designs are in the 1–10 GHz (2.45 or 5.8 GHz) RF band where there are minimum losses in the atmosphere.
In September 2023, it achieved a 14-Mbps data stream on the BW3 satellite. A year later, in September 2024, the company launched five additional satellites, BlueBird 1 through 5.
GW151226 was a gravitational wave signal detected by the LIGO observatory on 25 December 2015 local time (26 Dec 2015 UTC). On 15 June 2016, the LIGO and Virgo collaborations announced that they had verified the signal, making it the second such signal confirmed, after GW150914, which had been announced four months earlier the same year, [1] [2] and the third gravitational wave signal detected.
Larger arrays may be better for GW detection because the quadrupolar spatial correlations induced by GWs can be better sampled by many more pulsar pairings. With such a GW detection, millisecond pulsar timing arrays would open a new low-frequency window in gravitational-wave astronomy to peer into potential ancient astrophysical sources and ...