Introduction Inmarsat Satellite (Ref.3/4)) Inmarsat3-F3 (Launch 1998)Long = 27degEElev = 35,872Km (avg) Inmarsat3-F5 (Launch 1998)Long = 54degWElev = 35,793Km (avg)Visible QTH Inmarsat4-F1 (Launch 2005)Long = 143.5degEElev = 35,794Km (avg) Inmarsat4-F2 (Launch 2005)Long = 64degEElev = 35,794Km (avg) Inmarsat4-F3 (Launch 2008)Long = 98degWElev = 35,794Km (avg)Visible QTH Inmarsat4a-F4 (Launch 2013)Long = 25degEElev = 35,794Km (avg) Fig.2… Continue reading RTL-SDR for Inmarsat Satellite – Planning
Category: Electronics
Electronics: Hardware, Simulation Software, Microcontrollers
Radio Astronomy – FFT Averaging on GNURadio
Introduction In the previous post (Ref.1), I was able to receive the hydrogen Line at 1420MHz. This was probably the most difficult thing I have done in the past two years, it took 2 months of planning and trial and error measurements at all times of the day and various azimuths & elevations. I tried… Continue reading Radio Astronomy – FFT Averaging on GNURadio
RTL-SDR for Radio Astronomy – Signal Capture2
Introduction In the previous five posts, I looked at my receiving equipment used for GOES16, to see if I could re-purpose it for reception of the so called hydrogen line at 1420MHz/21cm (Ref.1/5). Over several weeks I tried and experimented with various times/configurations but was not able to receive the hydrogen line. Finally I took… Continue reading RTL-SDR for Radio Astronomy – Signal Capture2
RTL-SDR for Radio Astronomy – EM Interference
Introduction In the previous four posts I looked at re-purposing my receiving equipment used for GOES16 for reception of the so called hydrogen line at 1420MHz/21cm (Ref.1/4). I found that reception from my home location was not possible due to heavy interference or intermod. I did a brief study to get a handle on this.… Continue reading RTL-SDR for Radio Astronomy – EM Interference
RTL-SDR for Radio Astronomy – Signal Capture1
Introduction In the previous three posts I looked at my receiving equipment used for GOES16, to see if I could re-purpose it for reception of the so called hydrogen line at 1420MHz/21cm. I checked the dish for VSWR (Ref.1), and tested the LNA/BPF (Ref.2/3). The final step was to orient the dish for maximal reception… Continue reading RTL-SDR for Radio Astronomy – Signal Capture1