five

NU0C 40.79 -96.71 5MHz

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Mendeley Data2024-01-31 更新2024-06-28 收录
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https://zenodo.org/record/3474237
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Festival of Frequency Measurement 1 October 2019 NU0C 40.79 -96.71 5MHz.csv Festival of Frequency Measurement Submission ------ event: WWV Centennial UTC date: Oct. 30 2019 21:43:20 through Oct. 2 2019 01:08:03 beacon frequency: 5 MHz station name: NU0C latitude and longitude and/or maidenhead grid square: 40.789368 -96.705352 city: Lincoln state or region: Nebraska, USA Difficulties had: There is about a 5 minute gap in the data between 00:17:30 and 00:22:17 on Oct. 1 because fldigi inexplicably switched out of frequency analysis mode. When this was discovered I quickly rescued the written csv file and restarted. I have merged the two files together and attempted to correct the elapsed time offset. I hope I did this correctly. Anything you know about the stability of your equipment: RIG: Drake TR-7 transceiver controlled by a Drake RV-75 synthesized remote VFO. Measurements were made with the 400 Hz CW filter centered on the WWV carrier. The VFO operates in 10 Hz steps and stability is specified at +/- 15PPM from +5 to +55 degrees C, no more than +/- 20 Hz per hour after the first hour. Since the entire system is effectively crystal controlled in this configuration so I believe the stability to be quite good. The system has been running for several weeks without shutdown so I would say that it was thoroughly "warmed up". Antenna: Butternut HV-6V 8-band ground mounted vertical matched to 5 MHz with a Drake MN-2700 tuner. Computer/Software: Asus K55A dual core i5 laptop, Kubuntu Linux 18.04, 16G RAM, internal sound system, fldigi 4.0.18. soapbox: WWV 5 signals seemed to be quite good during most of this test, at least during the times that I was home and able to check. I hope you find this data useful. Sorry that I have no data for the control date, I was late coming to this party. Please contact me with any questions or comments you may have.
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2024-01-31
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