Detroit Federal Scanning - Updated!

Here's what I've been finding active in Detroit the past few weeks. I'll be updating this list as I find more active frequencies:

162.2375, CSQ - Unknown
163.6250, 107.2 - DHS Customs and Border Protection
163.9875, P-25 - Encrypted, most likely FBI
164.3875, 110.9 - Probably US Postal Service truck operations
164.4000, P-25 - USSS Papa, Detroit Field Office?
164.6000, P-25 - DHS CBP or ICE
164.9625, CSQ - US Postal Service, referenced BMC (Bulk Mail Center)
165.1875, 123.0 - Unknown, mentioned FIRE units - Canadian?
165.2375, 100.0 - DHS Customs and Border Protection
165.5500 - Unknown, sounded like DES
165.9125, P-25 - Clear, probably ATF
166.5875, 100.0 - DHS Customs and Border Protection
166.7375 - Unknown
167.6375, 167.9 - FBI
169.0000, 103.5 - Unknown, simplex or repeater input
169.9125, 167.9 - Possible input to 170.8250 repeater
169.9500, 110.9 - Probably USPS, referenced "A Dock"
170.5500, P-25 - Encrypted, likely FBI
170.8250, 167.9 - FBI repeater
170.9500, P-25 - Encrypted, likely FBI
172.9000, P-25 - TSA
173.8000, P-25 - Clear but not enough traffic to identify
406.2250, P-25 - FCI Milan, MI trunked system
406.7000, P-25 - Clear, talking about score of Tigers / A's game
407.0500, P-25 - FCI Milan, MI trunked system
408.1000, P-25 - FCI Milan, MI trunked system
408.3250, P-25 - FCI Milan, MI trunked system
411.0750, ? - Strange digital mode, doesn't sound like DES, but not P-25
415.2000 - DHS Federal Protective Service
417.2000 - DHS Federal Protective Service
418.7500, 156.7 - DEA F3 aerial surviellance

173.8125 MHz and ROSS / JENA Call Sign

I recently posted that 173.8125 MHz was a mystery frequency in my home base area of Portland, OR. The frequency is P-25 digital with almost 100% of the transmissions encrypted. I was finally able to positively identify the frequency as the FBI with the help of ROSS 25.

On Monday morning, October 9th, I caught ROSS 25, an FBI observation aircraft, calling Portland International approach control, telling them they would be working over downtown Portland at 4000 feet. Shortly after that transmission, 173.8125 MHz came alive with CLEAR P-25 traffic from "25", indicating they were having a tough time following the target on the ground! So don't give up on those encrypted channels!

Speaking of ROSS aircraft call signs - A poster on the MILCOM e-mail list is reporting that in his area the FBI aircraft have started using the call sign JENA (GINA, JEANA?) for flight operations. I've also received confirmed reports from the Seattle area of an aircraft previously heard as a ROSS flight now using the JENA call sign. And a message from South Florida indicates a JENA or JEANNA flight has been heard regularly down there. Anyone else hearing this call sign change for the FBI surveillance flights?