Priority 1 Away Team Assignments (P1ATAs) are an upgraded tier of Away Team Assignment. They pay higher-value resources and Officer shards. They also pay a dedicated currency, Pioneer's Crest, that only comes from completing them. They unlock at Ops 26. You must first research "Priority 1: Assignments Unlock", the first node in the Away Teams Research Tree. To launch one, defeat Augment Exile hostiles to earn Common Hijacked Splicers. Exchange them for Common Wrath Credits in the Augment Faction Store. Spend Wrath Credits on the Away Teams Exchange Bundle to get Planetary Charts (maximum 5000). Then spend Charts from the Away Teams screen to launch an assignment. Bringing Officers whose core stats and traits match the assignment's requirements should raise your odds of success.
A successful P1ATA pays refined materials, ship parts and Officer shards, and always pays Pioneer's Crest. A critical success adds bonus Rare or Epic Officer shards and extra high-value materials. Spend Pioneer's Crest on further nodes in the Away Teams Research Tree and on new Priority 1 bundles in the refreshed Away Teams Store. The tree includes Officer Cost Efficiency, more P1ATA slots, better chances of a Khan Quest Assignment (a rare, Epic-tier P1ATA), and direct unlocks for Benjamin Sisko, Kathryn Janeway and ENT-E Data. P1ATAs can also give ship blueprints (G3-G6).