  We use nearly two decades of helioseismic data obtained from the GONG
(2002-2020) and HMI (2010-2020) ring-diagram pipelines to examine the temporal
variations of the properties of individual equatorial Rossby modes with
azimuthal orders in the range $6 \le m \le 10$. We find that the mode
parameters obtained from GONG and HMI are consistent during the data
overlapping period of 2010-2020. The power and the frequency of each mode
exhibit significant temporal variations over the full observing period. Using
the GONG data during solar cycles 23 and 24, we find that the mode power
averaged over $6 \le m \le 10$ shows a positive correlation with the sunspot
number ($0.42$), while the averaged frequency shift is anti-correlated
($-0.91$). The anti-correlation between the average mode power and frequency
shift is $-0.44$.
