Rough estimates of global solar radiation are useful in many cases, like for example checking a radiometer’s response, or predicting evaporations-transpiration.

Computing these estimates is possible,GOLETA CALA ESMERALDA 1 58 using one of the many existing models. The Porsche 917 K Vincitore Mans 1971 N 22 Martini 1 43 Spark MAP02027113 library, for example, allows doing this in two different ways (three, if we consider the old MPDA method).

Existing estimation software is most often written in Fortran (the ROCO h0 74561, treno rapido carro EW II 1. 2. classe, SBB, Nuovo, Confezione Originale!), in C/C++ or other compiled language, which is fine if performance is at stake. There exist use cases, however, where performance is not that big issue, and maybe functionality is of greater interest; this is the area of use of Python and other interpreted languages.FRANKLIN MINT 1967 CHEVY CORVETTE..1 24..NIB..DOCS..RARE 427..UNDISPLAYED..MINT In them, support for numerical computations may be very strong, but specific physical modelling may be less available.

Library radest attempt filling this specific gap. Porsche 908 2 60 Haldi-Weigel Le Mans 1971 (Spark 1 43 S1981)

Using radest is a simple task: you just have to import it. Wel’ll see soon how to do, using a tiny example.

For the library (and the example code) to work, your Python installation should support version 3.6 or more, and have a working installation of NumPy. For using the library on your own, an elementary knowledge of NumPy, in addition to plain Python, is recommended. In particular, an understanding of ‘datetime64’ and ‘timedelta64’, the NumPy equivalents of ‘datetime’ standard Python types, is highly helpful.

Nothing really difficult, by the way.

And here’s the example.1 64 DCP LEFEBVRE KENWORTH T880 DAY CAB

Using radest allows to estimate the clear-sky global radiation. What would we then expect on a year, 2019 for example?

Here’s an answer:KK modelli in scala - 1 18 - OPEL KADETT K38 - 1938 - 180252BL

The preceding plot shows quite well the envelope of maximal radiation one could expect on a day. But, what happens on a specific day? Futaba special servo s3306mg analogico materiale trasmissione parteWe can see in the next plot, where data from approximate season beginnings are shown.

The preceding plot suggests something is in fact discernible in radest data. But, what its magnitude is, and what’s its time evolution? In other term: if we measure the shift of the maximum radiation occurrence from the local “noon”, do we see something really similar to the Time Equation?BBR MODELS BBRC18C - Ferrari F430 GT3 International GT Open 2009 59

In order to check this, I’ve built a tiny application (which, incidentally, shows some data processing in NumPy/Python.

This is the code: ART MODEL - 1 43 - FERRARI DINO S 206 COUPE-Le Mans 1966-ART141

And this is the plot:STARSHIP TROOPERS - HENRY VARRO PLAY ARTS KAI PAK ACTION FIGURE SQUARE ENIX

As we can see, there is something similar to the Time Equation.Gli EROI DELLA TEMPESTA-COMPLETA 12 Figure Set-il BLIZZCON DIABLO WOW Warcraft

One of the thing the radiation estimate is able to do is, as with any mathematical model, eliciting questions, and providing an instrument for answering them – to the degree of accuracy permitted by the model.Scuderia Toro Rosso Honda Str13 Brendon Hartley 2018 1 43 Model MINICHAMPS

And these two are questions, maybe useful in a high school sciences course:

1. How does radiation change with latitude, as we moe instantaneously over a given meridian?1 12 Darth Vader (hologram Ver.)
2. Let’s go back to Milan: how does radiation change with altitude on a given day?