WHETHER IN THE FOLLOWING DAY AFTER YAJUR UPAKARMA, 1008 GAYATRI JAPAM HAS TO BE DONE AS PART OF SANDHYA VANDANAM ?

gAyatrI japam has to be performed after doing the normal prAtah SandhyA vandanam with a separate sankalpa as "mithyAdhIta samvatsara prayascittArtham doshavatsu apatanIya dosha nirharaNArtham astottara sahasra sanhkyayA gAyatrI mahAmantra japam karishye."
PraNavasya Rishi brahma -----
AyAtu ityanuvakasya --- savitA devatA
upasthAnam