Earth tidal perturbations affecting laser-ranged satellites are critical for refining satellite orbital dynamics modeling, and their accurate computation represents a prerequisite for high-precision fundamental physical effects and geodetic investigations based on satellite orbit analysis. This study focuses on the tidal perturbations induced by the asymmetric responses of LARES 2 and LAGEOS on their orbital nodes and inclinations. Perturbations induced by a total of 402 (392 2nd and 10 3rd-order) earth tide constituents on the two satellites were calculated, based on Kaula's orbital perturbation theory and Lagrange's planetary equations for satellites, considering the frequency dependence of Love numbers. The asymmetric characteristics of tidal perturbations between the two satellites were quantitatively analyzed. The minimum resolutions of orbital inclinations and nodes, used as screening thresholds for significant constituents, were derived from the RMS of overlapping orbit differences using orbital geometry and error propagation law. With these thresholds, 83 significant constituents were identified from the 402. The cumulative effect of the 319 minor constituents was further evaluated, and it was found that their total impact, from coherent superposition, noticeably exceeds the thresholds, thus becoming non-negligible. The results of this study provide accurate tidal perturbation parameters for LARES 2 and LAGEOS, and offer methodological references for the screening of Earth tide constituents in high-precision satellite orbital dynamics research, laying a foundation for subsequent studies on inverting geophysical parameters from satellite orbits and verifying fundamental physical effects, particularly the relativistic Lense-Thirring effect.
Directs the Chair of the National Energy Dominance Council to designate coal as a “mineral” under Executive Order 14241, entitling coal to all of the benefits of that prior Order.
Directs relevant agencies to identify coal resources on Federal lands, lift barriers to coal mining, and prioritize coal leasing on those lands.
Directs the Secretary of the Interior to acknowledge the end of the Jewell Moratorium, which paused coal leasing on Federal lands.
Requires agencies to rescind any agency policies that seek to transition the Nation away from coal production or otherwise establish preferences against coal as a generation resource.
Directs CEQ to assist agencies in adopting coal-related categorical exclusions under NEPA.
Seeks to promote coal and coal technology exports, facilitate international offtake agreements for U.S. coal, and accelerate development of coal technologies.
Calls for the Secretary of Energy to determine whether coal used in the production of steel meets the definition of a “critical material” and “critical mineral” under the Energy Act of 2020, and if so, add it to the relevant lists.
Pushes for using coal to power new artificial intelligence (AI) data.
How those two get along must be an interesting technical problem, like reconciling relativity and quantum theory.
Of course, I get paid for neither problem, but can say assuredly that I rely mostly on HackerNews for information, and when looking for a paper, I will search with DDG to find a completely free paper (say, at arxiv) rather than the customary paywall put up by publishers (who probably pay Google to attract people who post here and who don't take the few seconds needed to find the free paper.)
Remember, "When all vetted information is paywalled, then most people will see only CT's, propaganda and falsehoods, which will always be free." The "Digital Divide" is real and it's spectacular(ly destructive).
And with bots and AI, politicians are able to rewrite history, as George Orwell detailed.
The Theory and Practice of Oligarchical Collectivism, by Emmanuel Goldstein
https://genius.com/Emmanuel-goldstein-the-theory-and-practic...
This internet is garbage, and I commend HN for being a good source, along with Wikipedia and arxiv. Those here who make an honest living on the internet should work to prevent its (further) destruction.