| 2- September-1998 | Nishant, the pilotless training aircraft developed by DRDO, is successfully flown from Chandipore. |
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| 5- September-1998 | Trishul and Akash test fired from Chandipore. |
| 12- September-1998 | India, Malaysia sign an agreement on cooperation in science and technology in Kuala Lumpur. |
| 29- September-1998 | ISRO successfully launches its largest sounding rocket, Rohini (RH-560 mk, 11 total payload, 127 kg). |