scivision

E-CHAIM altitude profile example

E-CHAIM ionospheric model is available for C, IDL, and Matlab. We will describe the Matlab version only here. There is a bug in E-CHAIM 4.3.0 and 4.3.1, and E-CHAIM 4.3.2 Matlab .zip is corrupted. I have emailed E-CHAIM team to let them know.

Until the E-CHAIM 4.3.2 download is fixed, use E-CHAIM Matlab release 4.2.1.

YouTube channel download using yt-dlp from Python

Just a simple script to store useful yt-dlp options. Like what one would do with a Bash script, but platform-agnostic.

Check outbound port connectivity using portquiz.net and Python

Demonstrates use of concurrent.futures.ThreadPoolExecutor and asyncio.Semaphore in separate examples to check outbound port connectivity.

In both examples, the maximum number of concurrent connections is limited to 5 (user option). This examples shows that Asyncio using

There are a few node types on BU SCC that are designed for MPI jobs. The job script syntax can be used for interactive session start.

qrsh -pe mpi_28_tasks_per_node 56

	%amsnr: SNR in AM systems
	%
	%This code contains functions to generate a message signal, amplitude
	%modulate a carrier and detect the message using envelope detection.
	%
	%Homework: Write code to perform SNR analysis as discussed in homework
	%5. Additional information is available in the comments below.
	%
	% Last modified: 2009-April-07
	%

	function aud = SSBdemod(modeDemod, fc)

	%k = [55e3 65e3]; %sample range to use
	k = [1 .2e6-1];


	figure(1)
	hT = subplot(3,1,1);
	hD = subplot(3,1,2);
	hF = subplot(3,1,3);

	cmake_minimum_required(VERSION 3.20)

	project(mini LANGUAGES Fortran)

	message(STATUS "CMAKE Generator: ${CMAKE_GENERATOR}")

	add_executable(mini mini.F)

	Notes on WSJT-X Installation for Mac OS X
	-----------------------------------------
	First just drop the wsjtx.app onto the Applications folder in the dmg window to
	install to Applications

	If you have already downloaded a previous version of WSJT-X then I suggest
	you change the name in the Applications folder from WSJT-X to WSJT-X_previous
	before proceeding.

	I recommend that you follow the installation instructions especially if you

	//Copyright Kevin Lawler, released under ISC License
	// https://getkerf.wordpress.com/2016/03/30/the-best-algorithm-no-one-knows-about/

	double random_double() //your random double function
	{
	//[0,1) uniformly random double, mt19937-64.c source is fine
	//keep in mind most double-based implementations drop randomness to 52-bits
	return genrand64_real2();
	}

	[flake8]
	max-line-length = 100