Scilab and ScicosLab are Open Source Math Programs that can be used in various engineering and scientific applications. I use ScicosLab with the Modnum tool box in all my Telecommunications work, but both Scilab/ScicosLab can be used for all the mathematics involved in my CelNav EBook. The video below is a brief introduction of both… Continue reading Scilab & ScicosLab – Open Source Math for CelNav

El 23 de julio no pude dormir, algo me dijo que me levantara. Salí al balcón, el cielo estaba despejado y todas las luces de los apartamentos cercanos estaban apagadas. La luna no estaba del todo llena, pero era absolutamente hermosa a unos 128 grados. Entonces, de repente, lo vi solo. Al principio pensé que… Continue reading Capella: Reloj en El Cielo

Introduction AIS Automatic Identification System for Ships is a traffic system that uses VHF transponders on vessels to periodically send out location information. It was developed by Swedish inventor Hakan Lans and is similar in concept to the ADS-B transponder system used on aircraft for position reporting. AIS uses two VHF marine channels 87B (161.975 MHz)… Continue reading RTL-SDR For AIS

Sunday July 14th was an excellent evening to measure a Lunar. The sky was perfectly clear and the Moon and Jupiter were clearly visible from my apartment balcony. This is generally not the case as there has been so much local construction in recent years. The distance measured from the Moon_NearLimb to the centre of… Continue reading Lunar Distance As Seen In Toronto

Miré hacia el Caribe desde la playa del Condado, imaginé que Ponce de León estaba parado en el mismo lugar, midiendo el ángulo del sol con su astrolabio. Ponce de León conocía su posición exacta porque le preguntó al Taíno Cacique Agueybaná dónde se encontraban exactamente en la galaxia. Así pudo calcular su intercepción. Tomé… Continue reading Intercept en la Playa del Condado Puerto Rico