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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Palaeolatitude; virtual geomagnetic pole？

又称： palaeolatitude · virtual geomagnetic pole

Definition 4.16 University Earth and Space Sciences — Year 3 · 第 4 章 — Geomagnetism and Palaeomagnetism

The palaeolatitude of a site is the latitude $\lambda$ given by its mean inclination through the dipole formula, $\tan I = 2\tan\lambda$ . The virtual geomagnetic pole (VGP) of a direction $(D, I)$ observed at a site is the north pole of the geocentric dipole that would produce that direction there.

The spherical triangle of the virtual geomagnetic pole: geographic north pole N, site S, pole P. The angle at the site is the declination D; the angle at the pole N is the difference of longitudes . — The spherical triangle of the virtual geomagnetic pole: geographic north pole $N$ , site $S$ , pole $P$ . The angle at the site is the declination $D$ ; the angle at the pole $N$ is the difference of longitudes $\beta$ .

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