Wasy Research

Data forecasting: The difference with interpolation and a practical example

Data forecasting or extrapolation is rudimentary different with data interpolation. In this post, we will explain the difference between forecasting (extrapolation) and interpolation in a simple manner and with a practical example.

Research

Managing data quality in research: How not to get garbage data?

Tools to obtained and process a large amount of high-quality data are available. However, these tools along are not enough to obtain high quality data.

Research

Managing “resistance” to “change” in research and development

In research activities, where we develop something new, there are unknown problems and situations that we must solve.

Research

DeepSeek versus OpenAI: How disruptive innovations could overturn a giant incumbent

DeepSeek has shocked the artificial intelligence (AI) world when they released their flagship DeepSeek R1 model.

Tolerancing

Geometric dimensioning and tolerancing: How to consider manufacturing processes when specifying GD&T tolerances

In this post, we will discuss why we need to consider manufacturing processes when selecting symbols of geometrical dimensioning and tolerancing (GD&T) and assigning values of each GD&T symbol on a mechanical drawing.

Tolerancing

Geometric dimensioning and tolerancing: How to consider measurement processes when specifying GD&T tolerances

In this post, we will describe things to consider related to measurement processes when we specify GD&T tolerances on a mechanical drawing.

Research

US vs UK-EU economy: How US economy grows much bigger and faster than UK-EU economy

In this post, we will briefly discuss and throw foods for thought for readers about the reasons behind the steep growth of US economy leaving behind other old developed countries, such as UK-EU and Japan.

Tolerancing

Predicting the cost directly when allocating the tolerance of the key characteristic (KC) of a mechanical assembly

In a car factory, when they want to change the gap between an engine hood and side fender within few or less mm, this change will cost thousands or even much more of dollars to the factory.

Research

A simple and practical way to best select tasks to finish

This is a light post, but practical and easy to implement, to improve our productivity in prioritising tasks.

Applied programming

Circular buffer for real-time applications with equal input and output data rate

In this post, we will discuss two types of real-time processing applied to global navigation satellite system (GNSS) signal processing. In addition, we will discuss a circular buffering system for real-time applications with equal data rate of input and output.

Metrology

Manufacturing and space: Multilateration using ranging signals for large scale dimensional metrology

Multilateration is a position determination method that is locating an object by accurately computing the distance between the object and three or more other objects (e.g., transmitter or laser tracker) with known positions. This method is also known as hyperbolic position determination.

Tolerancing

Manufacturing and space: How GD&T tolerancing is instrumental for rocket and satellite launcher

Sending satellites to space requires a launcher that can defy the gravity of earth and put the satellites into their orbits in space outside the earth’s gravity region. This post briefly presents the application of GD&T (from manufacturing discipline) to space applications.

Research

Research how to: A practical guide

Research is a challenging task and requires a substantial effort and resource including both time and monetary. However, we must (or most of us already) believe that research is a value-creation activity instead of a cost-centre activity.

GNSS

TUTORIAL on how to measure RF receiver noise: A practical approach

In this post, we will provide tutorial on how to quantify a receiver (instrument) noise. In addition, the basics of various unit of measurements related to signal processing will be discussed.

GNSS

GNSS signal tracking: The need for both PLL and DLL tracking

In this post, we briefly show what PLL and DLL are, why they need to be both implemented and the effect when we only use either PLL or DLL tracking loops.

Research

Research management: How to manage knowledge workers

Management is a well-known term that everybody has heard before. All aspects of our lives require management, from managing our home, and our study to our work or business.

Research

Research marketing: How to promote our research

Marketing has been considered important in all aspects of activity related to relationship with other entities such as customer.

Research

Competitive research strategy: Analysing factors toward leading research

Research world is very competitive, especially today, where resources (such as articles and technical/scientific reports) are abundant, and relatively easy and cheap to access. Like in industry, to be competitive in research, we need to have a strategy.

GNSS

Brief discussions on uncertainty contributors of GNSS-based positioning (Part 4)

Satellite orbit, the last main components required to calculate GNSS-based positioning, will be discussed in this post as well as the uncertainty contributors that are relevant to the satellite orbit estimation.

GNSS

Brief discussions on uncertainty contributors of GNSS-based positioning (Part 3)

Pseudorange is the distance between a global navigation satellite system (GNSS) satellite and a receiver when the offset of the receiver clock (with respect to GNSS timeline) is not yet corrected.

GNSS

Brief discussions on uncertainty contributors of GNSS-based positioning (Part 2)

In this post, we will start from the highest view of how we can estimate a position from at least four GNSS satellite ranging signals.

GNSS

Brief discussions on uncertainty contributors of GNSS-based positioning (Part 1)

In this blog series, we will discuss about uncertainty contributors on GNSS positioning and open a way to estimate the uncertainty for reliable positioning.

GNSS

TUTORIAL: Interacting with Movella XSense IMU sensor in C++

Inertial measurement unit (IMU) sensor is important for global navigation satellite system (GNSS) based positioning, velocity and timing (PNT) solutions.

GNSS

Real-time decoding of NAV messages of Septentrio receiver in C programming language

Septentrio receiver is one of the most used global navigation satellite systems (GNSS) receivers, including u-blox and Novatel GNSS receivers.

GNSS

Reading raw binary IQ data in C/C++ with malloc() and pointer

Digital signal processing (DSP) of radio frequency (RF) data very often deals with read from and write to a binary file with IQ format.