video – How are SpaceX rocket launches filmed?

If it was launched at the Kennedy Space Center in Florida, there are ten of these Contraves-Goerz Kineto Tracking Mounts spread around the complex. Contraves-Goerz is now a part of the L-3 Brashear company. Multiple cameras are attached and all the cameras on each mount are precisely aimed on parallel optical axes. Other launch facilities use similar, if not identical, hardware, though perhaps in fewer total numbers per facility.

Contraves-Goerz_Kineto_Tracking_Mount

The earliest similar types of mounts used to track and film rocket launches were based on early naval antiaircraft gun mounts. Some of these early versions had spotting telescopes used to optically aim the contraption.

Today a lot of the tracking functions are automated or semi-automated, but back when it all first started the skill of the operator was responsible for keeping the camera array pointed in the right direction. Just as with those old anti-aircraft guns, the thing was aimed by using sets of control wheels, one set for altitude and one set for azimuth. These control wheels are similar to what one would see on large, crane mounted cinema cameras on a movie set during the same time period. The rocket tracking control wheels had both higher and lower ratio gearing that made both coarse and precise adjustments possible. A full 360° turn of the precision wheel might only move the mount a fraction of 1°!

Similar (near identical) systems are used to track and record other high speed flying objects. This would include military hardware during testing and developement (planes, missiles, even large artillery projectiles such as those launched by a tank or larger artillery guns, etc.)

You can read all about the (non-classified parts of the) workings and performance of these systems here.

This document from NASA explains how they are used at the Kennedy Space Center.

❕NEWS – Maker Of Zcash Launches Educational Program For Crypto | NewProxyLists

The maker of Zcash Electric Coin Company launched a new educational training called “Crypto in Context” which will teach people about cryptocurrency. Popular exchanges like Gemini and Binance are also participating. Crypto in Context is also looking forward to hosting educational events around the world. They are planning to offer crypto lessons to the poor and needy.

Community News: TheStack Launches New VPS Control Panel and 5 New Locations

As part of LowEndBox’s new “interesting news” series we are publishing, we recently received a submission from @StackNetwork on LowEndTalk. We found their news submission interesting because it includes a new in-house control panel software for their VPS platform, which puts them in a unique position of not simply using SolusVM like so many of their competitors in the industry. Hopefully they continue to develop their in-house system, as doing so will continue to help them stand out in the marketplace. 

TheStack was last featured on LowEndBox in April 2020 with a 4GB KVM offer based in Los Angeles. 

Here is the announcement we received from them:

Just released: New VPS Control Panel System Enters Production

We’ve worked out a new VPS system with some nice features, such as:

  • Power On/Power Off/Reboot VMs
  • Real-time CPU/Disk/Network graphs
  • HTML5 VNC Console
  • Reset VM password within 1 click without reboot
  • Reload OS from many templates, in a blazing fast speed, and Ubuntu 20.04 LTS has been supported once it’s released
  • Snapshots & Backups
  • Firewall policies

Check out a picture of TheStack’s new VPS Control Panel:

TheStack also wanted to share that they’ve recently launched 5 New Locations for VPS

  • San Jose, CA
  • Chicago, IL
  • New York City
  • Amsterdam, NL
  • Frankfurt, DE”

For those interested to learn more about TheStack, check out their website by clicking the banner below:

We are always looking for interesting community news!

Are you a hosting provider, VPN provider, or similar with interesting industry news? We’d like to hear from you. You can do so easily, either by sending us a message directly on LowEndTalk or by submitting a ticket on our helpdesk.

Jon Biloh

I’m Jon Biloh and I own LowEndBox and LowEndTalk. I’ve spent my nearly 20 year career in IT building companies and now I’m excited to focus on building and enhancing the community at LowEndBox and LowEndTalk.

Best way service that launches a notification when obtaining a certain value of a variable??? Help me please (app type tamagotchi)

I started with foreground service but if within this service I start a timer it seems that the timer works but the notification is not launched when the phone is locked for a while. With a runnable handler the handler is simply paused, which does not work either, I have also tried using wakelocks, even a broadcast receiver and there is no way. Should I launch the service as another service from the foreground service? Is it the fault of my Huawei phone? How can I get a notification to be triggered depending on a variable that changes every second while the phone is locked? I have tried a thousand things and I do not achieve my goal, help please, thank you

space – Is it possible for foreigners to watch rocket launches in China?

China is an active spacefaring nation, with launches scheduled on a monthly basis from four major launch sites around the country. The newest of these, in Wenchang, is even conveniently located on subtropical resort island Hainan and apparently a major local tourist attraction.

However, is it possible for non-Chinese nationals to view rocket launches at these sites? The oldest and largest site, Jiuquan, has historically been completely off limits to foreigners, and while this news story from 2007 (!) implies all four are in various stages of opening up, the bureaucracy still sounds formidable (“Since satellite launches have strict requirements over a variety of issues, the launch center will not allow tourists to watch the scene unless all necessary precautions are taken.”) and concrete information in English on what’s possible, where to apply etc seems very thin on the ground.

(Also, I know China at time of writing basically bans inbound tourists due to COVID-19 concerns, but for the purposes of this question, please assume the visitor is already in the country.)

Spin Servers Launches New Website, Order Experience, and Client Interface

New website released by Spin Servers introduces a new order experience and client interface

May 26, 2020

Dallas, TX — Spin Servers, a Dallas IaaS provider offering dedicated servers, hybrid servers, cloud hosting, enterprise hosting solutions, and more – announced today a major milestone by launching its new website. After months of planning and work, the new interface is more intuitive than ever before with a modernistic design, new ordering experience, and elegant client interface.

“The new Spin Servers experience makes our services more accessible to the masses, with the goal of simplification in mind.” said Arnav Kejriwal, Director at Spin Servers. “With the roll-out of our new website, not only are we featuring our all new dedicated server packages where you can instantly deploy bare metal servers with up to 512 GB RAM at your fingertips, but we also now have specific pages designed to explain the features that are standard with every Spin Servers service: Virtual Private Clouds (VPC), Flexible IP (FlexIP), Bring Your Own IPs (BYOI), and DDoS Protection.”

The new website additionally unveils a proprietary order form – which provides a more streamlined experience than ever available before. Within the same page, customers are now able to add multiple quantities of each server configuration.

“The new order experience better reflects our business motto to spin up servers fast and seamlessly. We have a minimum of hundreds of servers in stock at all times, and customers don’t need to order each server one by one anymore. They can instead configure everything within one cart, one page, within just a few clicks of a button. For customers looking to instantly deploy bare metal servers in mass-quantities, this can save a ton of time as opposed to the traditional method of ordering.” Arnav elaborated.

To learn more about Spin Servers or to view its new website launch, visit https://www.spinservers.com/

About Spin Servers:

Spin Servers is a privately owned US-based provider of dedicated servers, colocation, and cloud solutions. Spin Servers’ motto is to let you “spin up servers” fast, seamlessly, and affordably. Spin Servers is one of the first and only hosting providers to be an integrated hardware reseller. Its sister company, MET International has been in the server hardware business since 1994. With Spin Servers being vertically-integrated with MET International, servers are considered an asset, not an expense, delivering cost savings of up to 50% to you, while providing exceptionally high level of service. Server hosting services are delivered out of its state-of-the-art Dallas, TX datacenter facility which meets all HIPAA, PCI and SOC 2 Standards.

Office 365 developer – Assign a member to the group via the Powershell Graph API API launches Request_BadRequest

Call the following code:

$uri = "https://graph.microsoft.com/v1.0/groups/(groupID)/members/`$ref"
$body = (@{'@odata.id'='https://graph.microsoft.com/v1.0/directoryObjects/(memberID)'} | ConvertTo-JSON)
Invoke-WebRequest -Method "POST" -Uri $uri -ContentType "application/json" -Headers @{Authorization = "Bearer $retrievedToken"} -Body $body -UseBasicParsing -Verbose

Return:

Invoke-WebRequest : { "error": { "code": "Request_BadRequest", "message": "No URI value was found for
an entity reference link. A single URI value was expected."

Note: The same request in Graph Explorer works as expected.

WhatsApp officially launches new 8-person group video chat option – social media marketing (SMM)

After it was preview by Facebook CEO Mark Zuckerberg at the end of last week, WhatsApp has now officially announced the launch of her new encrypted video chat option for 8 people, which doubles the capacity of WhatsApp group video calls.

WhatsApp video calls

As explained by WhatsApp:

"The COVID-19 pandemic has meant that many of us are isolated from friends and family, and as a result, we have seen that people are turning to voice and video calls on WhatsApp more than ever. Group calls were particularly helpful and our users asked to connect with more people at the same time. Starting today, we are doubling the number of participants you can have on a WhatsApp video or voice call from 4 to 8 people at a time. "

plotting – The custom FrameTicks function launches "MemoryAllocationFailure"

A simple function for FrameTicks returns memory errors when working with large powers of 10.

fticks = Table[{j, ScientificForm@j, {0.2, 0.}}, {j, 
     PowerRange[10.^Floor[Log10[Exp[#1]]], Exp[#2]]}] &;
LogLogPlot[10^x, {x, 9, 11}, Frame -> True, 
 FrameTicks -> {{fticks, None}, {Automatic, None}}]

Error message

SystemException ["MemoryAllocationFailure"]

It works well for small numbers, for example replacement 10^x by Tan[x].

Mathematica 11.3; Ubuntu 18.04

sharepoint online – Power Automation approval workflow triggered by "When an item is created" launches two simultaneous workflows

I have a workflow that is triggered when someone uploads a SharePoint file to a library ("When an item is created"). Sometimes this workflow starts a duplicate workflow for the same file, about 30 seconds after the first one. Any ideas why there would be a duplicate workflow? Is the second launched because there are "mandatory" columns, and the user fills in these fields on the upload.aspx page and then presses "archive" to trigger another workflow?