Title
Ionospheric Anomaly Related to Earthquake: Principal Component Analysis and Nonlinear Component Analysis,Used
Delivery time: 8-12 business days (International)
Principal component analysis (PCA) and nonlinear principal component analysis (NLPCA) are used to detect ionospheric anomalies. The ionospheric anomalies related to Haiti earthquake on 12 January 2010 are researched by PCA in Chapter 1. The ionospheric anomalies related to Taiwan ChiChi earthquake on 21 September 1999 are researched by NLPCA in Chapter 2. The ionospheric anomalies related to Japan Tohoku earthquake on 11 March 2011 are researched by PCA and image processing in Chapter 3.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.