Tender For corrigendum : supply of gps based oscillation monitoring system (gps-oms) as per rdso specification no. tm/sm/420 version no.1.2 dated 14/07/2023 or latest up to the date of tender opening including processing unit with application software tablet model (android based) 2.acce, note of specific condition: 1) gps oms machine should be tab based. 2) gps provided with tab based oms machine should be worked in long tunnels up to 7 kms or more. [ warranty period: 30 months after the date of delivery ]