Hisar O+'s radar seeker is AGRAS-100SA(Surface Air?), Siper Ürün-1 uses the 110, while Hisar-D's is dubbed the 150. 150km ranger Siper Ürün/Product 2 will have the AGRAS-400SA.
Still not clear what Sapan will exactly be.
"A variant of the missiles used in the Hisar O+ system is the HİSAR O+ missile with RF Seeker Head (AGRAS-100SA)."
"With the experience gained in HİSAR O+ RF, the first output of the SİPER Long Range Regional Air Defense System development process, the SİPER Product-1 missile, was first introduced. The SİPER Product-1 missile, which uses the ASELSAN Radar Seeker Head (AGRAS-110SA), is currently being prepared to enter the inventory."
"Firing tests have begun with the HİSAR-D missile using ASELSAN Radar Seeker Heads (AGRAS-150SA)."
"Within the scope of the near-term needs of the Naval Forces Command, the studies to increase the capability of Radar Seeker Heads for air defense missiles to be used in the SAPAN Project continue with AGRAS-200SA and AGRAS-500SA. The Radar Seeker Head (AGRAS-400SA) is being developed for the SİPER Product-2 missile developed within the scope of the Long Range Regional Air Defense System SİPER, which constitutes the top layer of the ongoing air defense system projects."