Dan and I are currently working on AAVSO Alert Campaign #938. Below is a summary of what we are doing. The project encompasses six Delta Scuti stars, one of which is CzeV616.
CzeV616 is a Delta Scuti pulsator with a primary period of 0.126475 days (about 3h 2m) and a V-band range of roughly 10.92-11.06 mag. VSX also lists a second, closely spaced period near 0.129927 days, and the beat between the two causes the pulsation amplitude and phase of maximum light to drift slowly over many days. A single night from one site samples only a narrow slice of that beat cycle, making CzeV616 well suited to a phase-stepped campaign rather than a one-night observation.
A phase-step strategy compensates for the core limitation of single-site photometry: each run covers only the phase window visible during that night. By scheduling successive sessions on nights whose predicted maxima fall at different points in the pulsation and beat cycles, an observer builds a densely phase-covered light curve without needing multi-site coverage. In practice this means using a VSX-based linear ephemeris to identify observable maxima, then differential aperture photometry in AstroImageJ against a comparison/check star from the AAVSO VSP chart, timestamped in BJD_TDB so points stay directly comparable night to night and against archival AAVSO/TESS data.
The payoff is twofold: a well-sampled light curve refines CzeV616's period and epoch and reveals any long-term O-C drift, while sessions spread across the roughly month-long beat cycle can directly detect the amplitude/phase modulation predicted by the two close periods, an independent ground-based check on the reported multiperiodicity. Submitting the time series to the AAVSO database extends the star's observational baseline for future study.