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  • [LUX] NASA Capstone Launch – A Photo Album

    [LUX] NASA Capstone Launch – A Photo Album

    Introduction

    Hi there!

    Since my misadventure has even garnered a headline in national news, I thought I’d quickly put together a travel log of sorts. Sans the few hours under the playful gaze of the stars, it has been a much-needed solo journey to talk to and catch up with my wants, visions, and priorities.

    Before I ramble on, many of you might have just come to see my rocket launch photo in full HD, and here it is.

    Feel free to use it (CC-BY-SA 4.0).

    I did quite publicly promise a technical aside on the significance of CAPSTONE (Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment). but I think in the interest of time I am better off pointing you to NASA.

    Alternative version: https://commons.wikimedia.org/wiki/File:CAPSTONE-LAUNCH.jpg

    Comment on That Image

    During the launch window, the sky cooperatively cleared up, and most low-level clouds drifted away. As such, the “halo” you see around the thruster flame trail is most likely just due to condensation on the surface of my camera lens.

    I wasn’t able to take a temperature / humidity reading of the moist night at Nuhaka beach, but that my lens was consistently fogging up in the matter of minutes really underscored the challenge of the environment (and caught me by surprise).

    The surprise factor was especially because I’d performed a full dress rehearsal at the same location the night prior. In hindsight, the test was conducted during civil twilight, and the sands were still warm. Certainly a mis-controlled variable.

    Before I further compromise the time ordering, here’s the test shot produced 28 hours before the actual launch. For many-a northern hemisphere readers of mine, the southern celestial pole is clearly visible, which might not be a familiar sight (it’s much lamer than the Big Dipper and Polaris anyway).

    Other stuff

    This trip was organized under the assumption that the launch was to go ahead in the evening of Saturday 25th of June, but was stretched to accommodate the revised dates (Monday 27th, and later Tuesday 28th — better late than fail). It was indeed a good lesson on managing expectations and realistically-assessed risks. I say that after I got to see the launch, but have made up my mind far before reaching certainty that I will.

    During these days, I’ve driven over 1700km according to my odometer, with most travels being meaningful and only less than 30% of those roads being unsealed gravel.

    I had also produced a pile of real-time narrated driving footages, like this one

    The current generation FW Virtual Passenger – a GoPro.

    Selected Images (In CHRONOLOGICAL Order)

    24 June (Matariki) – Auckland, Taupo, Napier

    25 June – NAPIER, HASTINGS, NUHAKA, Gisborne

    26 June – Gisborne

    27 June – GISBORNE, Mahia, Wairoa

    28 June – MAHIA, Wairoa, Nuhaka, The Launch, RotorUa

    Secret bonus content.

  • Humanity’s first portrait of Sagittarius A*

    Humanity’s first portrait of Sagittarius A*

    The supermassive black hole at the core of our galaxy.

    This essay is due to appear in the next issue of UoA Scientific.

    (more…)
  • to the High school Physics Students I Met Recently

    Originally published in April 2022, access restored April 2024.

    This essay shall not be taken as a direct address to any particular individuals with whom I interfaced at this weekend’s unnamed national-level physics competition event, where I have served as a judge for quite some time now.

    2022 has also been the first year I have grown wise enough to remove the “High School Honours and Achievements” section from my own CV. From a perspective not so far removed from that change, I hope I can explain why I both feel bad about the event in its current format, and will be like extending my participation through the rest of my residency in Auckland.

    In Series …
    THE APERIODICALS
    Local (personal, potentially shallow, and subject to change) outlooks on science, technology, growth, and occasionally culture and history. The goal is to write something every week, but whether it can make its way to FWPhys is random. Hence the series title.

    (more…)
  • “Curiosity” – Companion Booklet

    “Curiosity” – Companion Booklet

    This post is to serve as a companion booklet to my bizarre release “Curiosity – Select Piano Compositions”.
    It is available on 15 Apr 2022 on streaming platforms and digital marketplaces around the world.

    (more…)
  • Elegy for Mriya

    Elegy for Mriya

    UR-82060:

    Your mission is over.
    Good night.

    Past glory may condense
    into a worn out vigniette of the future
    and pitiful witnesses’ rants.

    There’s a calmer patch of sky for you.
    — There will be.

    Your vapour trails,
    tracing humanity’s pursuit of progress and solidarity,
    your constructors’ dreams.

    Your thruster flames,
    colouring fairy tales of our descendants,
    living under, towards, and amid the stars,
    and bringing them closer.


    Author with a Lego Scale Model of the Antonov-225. Auckland Museum, 2020

  • Designing and Building a Holographic Webcam System

    Thicc palpatine : r/PrequelMemes
    Hi Sheev.

    Motivation and Project Overview

    Like how the people in the Star Wars universe take for granted, I want to bring hologram video calling into reality (albeit mono-directionally for the time being), using the current video conferencing infrastructure, and keeping the finished product as open-source as possible.

    Executively speaking, this project makes use of a typical pyramidal hologram projector and real-time video stream synthesis using OpenCV and Python. It will be broken down into three (four) distinct tasks.

    • A. Design and manufacturing of projectors for various devices.
    • B0. Deployment of a custom iOS app that on each device
      • collects video feed,
      • syncs time,
      • performs necessary image corrections like perspective change, and
      • compresses and transmits video streams over wired connections.
    • B1. Evaluation of lighting and camera mounting positions.
    • C. Real-time video synthesis fed into virtual camera software.
    9 Best Hologram Apps for Android and iOS in 2022 - REGENDUS
    A Mobile Hologram Projector. Source: https://www.regendus.com/best-hologram-apps/

    The first page of my early notes is attached.

    (Code and design blueprints will be available on GitHub after the design phase ends)

    Progress

    A.

    Trivial.

    B 0.

    Not yet implemented.

    B 1.

    Not yet implemented. I have 4 idevices that can at least capture at 1080p.

    C.

    6 Feb 2022

    I used OpenCV to stitch four feeds together and broadcast the result into Zoom as a virtual camera. Before further optimization efforts, I currently make use of a transparent PNG of a right-isosceles triangle.

    Using this picture, pixels in the video feeds whose coordinates match the mask is transparent are discarded, and the resulting four triangles are combined using Numpy magic.

    The inner shadow effects may be able to be multiplied back into the video stream and provide a vignette effect, but that is not implemented in the current pipeline.

    In all, the system can output 1080 × 1080 images like this at slightly over 50 frames per second.

    And here’s the synthesized feed on a receiving Internet terminal, static but refreshing at 30 FPS.

  • Two Recent Poems

    The Star Carver

    They say you find a lively memory
    of a world’s early ages
    deep within.

    Shapes without colours
    colours without shapes.
    Endeavours without maps,
    vision without eyes.

    To rejoin the silence was to speak;
    to leave behind all lights was to see.

    Feel the pristine ground.
    Touch the running water.
    Does a fire burn afar?
    Do you hear the shadows flicker?

    For all our ignorance,
    — and wonder we hence pursuit —
    is but a cave

    And someone carved out the gaps
    through which starlight shone.

    (January 2022, Westport)

    Togetherness

    A memory.
    A yearning.
    A wish.

    A service.
    A product.
    A prompt for grandiose visions.
    An entrance to elaborate fraud.

    A remnant of creation.
    A backdrop of being.
    A catalyst of love.

    A state.
    A stage.
    A taste.
    Away.

  • FW’s Cosmology Unwrapped 2021: a year of papers in Review [Ongoing]

    FW’s Cosmology Unwrapped 2021: a year of papers in Review [Ongoing]

    A summary of papers I keep in a special Mendeley folder: stuff that I consider big news and major developments in the field of cosmology and nearby areas.

    I will do one every year from now on. This is aimed at a general physics audience, and the stories are not presented in any particular order.

    (more…)
  • 357686312646216567629137 and Friends

    357686312646216567629137 and Friends

    Gold sold out. Silver still available for US$1 each.

    (more…)