FA9101-21-Q-2013_QnA.pdf

29 Mar 2021

MEMORANDUM FOR WHOM IT MAY CONCERN

SUBJECT: FA9101-21-Q-2013, Tracking Mounts, Questions and Answers

1. Will you be driving the mount from your own tracking camera or other pointing instrumentation?

There are no specs or requirements for any such device that is normally a part of the tracking mount.

• The intention is for the system to be operated manually for now and configured with an auto tracking system at a later date. Pointing the pedestal at a target will come from photo optical instrumentation that is in current inventory.

2. Will you provide the Payload Platform, or will you require us to supply the Payload Platform, if you require us to supply it, will you be supplying a spec or requirements list for it?

• Most pedestals have their own platforms. If this system does not, then the HHSTT will have to engineer one for the equipment that is in the current inventory. The system must be configured with a way to mount a camera or platform to the pedestal.

3. If you will be using your own cameras or other devices will you be using our slip rings that are included or will you deliver the tracking data via cables.

• Power, trigger, timing, and video feeds (both high definition and NTSC) must be fed through the slip rings. 117VAC and 60Hz is required for the cameras. Two slip ring pairs have to have timing

(IRIG) to the cameras, and two pairs must be dedicated for TTL to 24 VDC triggers. HD-SDI or

NTSC video signals must be fed through the slip rings.

4. If you will be using our slip rings what camera or device interfaces will you need?

• Power (117/120VAC at 60Hz), IRIG timing, multiple triggers, multiple NTSC videos, multiple

HD videos (HDMI or SDI). Possibly AZ/EL encoder information.

5. The MIL-STD-810 is listed, do you have specific requirements within the many Test Methods listed in the MIL-STD-810, or do you need it to meet all?

• For this application, the specifications required are for Temperature, Solar Radiation, Rain, and

Sand/Dust

Temperature is specifications 501.5 and 502.5. However, this item will not fit into the extreme levels of temperatures listed in these specifications. The system needs to be operated within a temperature environment ranging from 10 - 120 degrees F.

Solar Radiation, specification 505.5 due to the high levels of UV radiation that we experience in our testing environment. The external components need to with stand the levels specified in 505.5 at the ground level, not space atmosphere.

DEPARTMENT OF THE AIR FORCE

HEADQUARTERS AIR FORCE TEST CENTER

(AFMC)

EDWARDS AIR FORCE BASE CALIFORNIA

Rain, specification 506.5. While the system should not be operated in the rain, there are times that the equipment could be operating during a rain event, meaning that the equipment needs to be sealed well enough to keep rain out of the pedestal electronics.

Sand and Dust, specification 510.5. This equipment will be operated in high dust environment so the system will need to be seal such to keep dust and dirt out of the internal pedestal system and electronics.

6. Do you need a direct Encoder Output or is it sufficient reading position back over RS232?

• For fast tracking purposes, direct encoder output is required. It is unknown if RS232 is fast enough to provide encoder information between video frame rates.

7. If reading the encoder position over RS232 is not acceptable, would a derived output from the servo controller suffice, or does it have to be that actual encoder output?

• While actual encoder output would be desirable, due to the size of the pedestal it is expected that the encoder positioning would be a derived output from an inductosyn/resolver pair. This output needs to be a parallel output and not in a serial format.

8. The Payload weight is stated at ‘up to’ 200 lbs. and the Controllable angular Velocity is shown as

120 degrees/sec, and Controllable angular Acceleration is shown at 120 degrees/sec/sec. Do these have to at the same time, ie, if we meet the Velocity and Acceleration speeds at lower payload weight will that be adequate, if we supply a look up table? Our standard system is rated typically at 150 kg

(330 lbs.) at Velocity 90 degrees/sec and Acceleration 90 degrees/sec/sec. Would that be acceptable?

• The system must operate at 120 degrees/sec angular velocity with a 200 lb payload. The system must be able to accelerate at 120 degrees/sec/sec to get to the tracking velocity during operation. It would not be expected to track at a 120 degrees/sec angular velocity and then accelerate again at 120 des/sec/sec. It is doubtful that a larger payload be applied to the pedestal. If the payload exceeds the

200lb limit it would be expected to operate at a lower capacity than specified. A look up table is not desirable.

9. The Delivery is shown at 120 days after receipt of award. How fixed is this? Would you accept delivery of the first one within 120 days and then at 2-3 month intervals of the following units? Or what would be acceptable?

• That is an acceptable delivery timeline. Due to numerous delivery questions, the requirements document and solicitation has been updated to reflect delivery of all units no later than 365 days following award of the purchase order.