According to officials, the ISRO will launch ScatSat -- a weather monitoring and forecasting satellite -- with polar satellite launch vehicle (PSLV) end of next month.The Indian satellite will be a co-passenger to an Algerian satellite.Both the satellites will be put into different orbits. So the fourth engine of the rocket will be switched off after ejecting ScatSat first. Then after a gap of around 30 minutes, the engine will be switched on and put the Algerian satellite into its intended orbit.

PSLV-C35 / SCATSAT-1SCATSAT-1 is a continuity mission for Oceansat-2 Scatterometer to provide wind vector data products for weather forecasting, cyclone detection and tracking services to the users. The satellite carries Ku-band scatterometer similar to the one flown onboard Oceansat-2. The spacecraft is built around standard IMS-2 Bus and the mass of the spacecraft is 360 kg. The spacecraft will be put in SSP orbit of 720 km altitude with an inclination of 98.27 deg by PSLV-C35. The mission life of the satellite is 5 years. The satellite is scheduled for launch during Second Half of September, 2016 onboard PSLV-C35 from SDSC SHAR , Sriharikota.

Six small commercial satellites of foreign customers are slated to be launched this month-end along with the ocean data gleaning Scattsat-1. ISRO Chairman A.S. Kiran Kumar said Algerian satellites and three others would be launched on the PSLV.

Students satellites, PISAT and PRATHAM, flagged off from ISRO Satellite Centre,Bengaluru on 11-Sep-2016

CanX-7 went through Indian customs on Sept 8 from Canada at Chennai air cargoAlsat-1N on Sept 2 from UK at Chennai air cargoAlsat-1B on Sept 2 from UK at Chennai air cargoSo the final list of satellites onboard would be:Scatsat-1, Alsat-2B, Pathfinder-1, Alsat-1N, Alsat-1B, CanX-7, Pratham, Pisat

So the two PlanetiQ satellites, Max Valier Sat and Venta 1 are not flying on C35?

A1964/16 - PSLV-C35 ROCKET LAUNCH FM SHAR RANGE, SRIHARIKOTA WILL TAKEPLACE AS PER FLW DETAILS. THE LAUNCH WILL BE ON ANY ONE OF THE DAY DRG THIS PERIOD.ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24HR IN ADVANCE THROUGH A SEPERATE NOTAM. LAUNCH PAD COORD: 1343.9N08014.2E NO FLT IS PERMITTED OVER THE DNG ZONE. A.DNG ZONE-1 IS A CIRCLE OF 10NM AROUND THE LAUNCHER B.DNG ZONE-2 IS A SECT BTN 20NM AND 60NM FM LAUNCHPAD AND BTN AZIMUTH ANGLES OF 130DEG AND 150DEG FM TRUE NORTH. C.DNG ZONE-3 IS A RECTANGULAR AREA BOUNDED BY: 1205N08110E 1230N08135E 1130N08220E 1105N08155E D.DNG ZONE-4 IS A RECTANGULAR AREA BOUNDED BY: 1040N08215E 1100N08240E 1015N08315E 0955N08250E E.DNG ZONE-5 IS A RECTANGULAR AREA BOUNDED BY: 0835N08320E 0835N08350E 0745N08350E 0745N08320E F.DNG ZONE-6 IS A RECTANGULAR AREA BOUNDED BY: 0455S08145E 0510S08255E 0755S08215E 0740S08105E G.DNG ZONE-7 IS A RECTANGULAR AREA BOUNDED BY: 5540S06830E 5625S07120E 6420S06740E 6355S06450E ROUTES AFFECTED IN CHENNAI FIR: W20,A465,,P761,P574,B466,L896,N563,N564, Q10,Q11,Q23,Q24,V3,V4,V6,V8,V9 V11 AND T3 CLOSURE/ALTN ROUTINGS 1)P761 NOT AVBL BTN MMV VOR AND IDASO ALTN RTE: MMV VOR-DCT-PT A 1228N08042E DCT PT B 1254N08138E-DCT IDASO(BIDIRECTIONAL) 2)W20 NOT AVBL BTN MMV VOR AND BODEL ALTN RTE: MMV VOR-TR319/139DEG-53NM-TTPVOR TR357/177DEG-81NM-BODEL(BIDIRECTIONAL) 3)A465 NOT //PART 1 OF 2 PARTS//. BTN 0330-0730, 26 SEP 03:30 2016 UNTIL 25 OCT 07:30 2016. CREATED: 16 SEP 07:03 2016

EDIT: Or are they attempting a 4th stage deorbit this time?

The rocket will first place the 370-kg ScatSat-1, a weather satellite to watch for cyclones, in orbit 720 km above the earth. About an hour and 20 minutes later, it will inject seven smaller satellites into an orbit 670 km above the earth. Among the seven are two satellites, one of them from IIT-B, and five belonging to international customers including the US

To achieve this, the fourth stage of the rocket will be ignited twice. The maximum time Isro has taken for any launch is about 20 minutes after launch. Monday’s mission will last 2 hours and 15 minutes.

Satish Dhawan Space Centre director P. Kunhi Krishnan said the ScatSat-1 will be separated within 17 minutes of launch, after the fourth stage is shut off. The stage will be ignited briefly after 1 hour and 22 minutes and stopped. It will be started again about 40 minutes later, and the last satellite will be placed in orbit about 2 hours and 15 minutes after launch.

“We have demonstrated the fourth stage engine restart capability. The fourth stage was restarted once in case of PSLV C-29 and twice with respect to PSLV-C34” Mr Kunhi Krishnan told this newspaper.