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Grape 1 Legacy (fldigi-based Doppler Receiver)

ResourceID
spase://HamSCI/Instrument/PSWS/Grape1Legacy

Description

The Grape 1 Legacy Doppler Monitor (fldigi version) is a citizen science instrument developed as part of the HamSCI Personal Space Weather Station (PSWS) project. It is a low-cost, easy-to-assemble system designed to receive, analyze, and record signals from frequency standard stations such as WWV, WWVH, and CHU. Using a low-IF receiver board, a GPS-disciplined oscillator (GPSDO), and a Raspberry Pi running a custom HamSCI fldigi-based image, it measures Doppler frequency shifts caused by ionospheric variations on a 24/7 basis. Data is typically recorded in CSV format. Grape 1 systems have been operational since 2019 and have been used in studies of space weather impacts, including during the 2024 North American total solar eclipse. The Grape 1 is a receive-only device and does not require a ham radio license to operate.

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Details

Version:2.7.0

Instrument

ResourceID
spase://HamSCI/Instrument/PSWS/Grape1Legacy
NamingAuthority
HamSCI
ResourceHeader
ResourceName
Grape 1 Legacy (fldigi-based Doppler Receiver)
ReleaseDate
2025-05-28 16:25:25
Description

The Grape 1 Legacy Doppler Monitor (fldigi version) is a citizen science instrument developed as part of the HamSCI Personal Space Weather Station (PSWS) project. It is a low-cost, easy-to-assemble system designed to receive, analyze, and record signals from frequency standard stations such as WWV, WWVH, and CHU. Using a low-IF receiver board, a GPS-disciplined oscillator (GPSDO), and a Raspberry Pi running a custom HamSCI fldigi-based image, it measures Doppler frequency shifts caused by ionospheric variations on a 24/7 basis. Data is typically recorded in CSV format. Grape 1 systems have been operational since 2019 and have been used in studies of space weather impacts, including during the 2024 North American total solar eclipse. The Grape 1 is a receive-only device and does not require a ham radio license to operate.

Contacts
RolePersonStartDateStopDateNote
1.TechnicalContactspase://SMWG/Person/William.Engelke
2.MetadataContactspase://SMWG/Person/Kornyanat.Hozumi
InstrumentType
Experiment
InvestigationName
HamSCI Personal Space Weather Station (PSWS)
ObservatoryID