Announcement

Collapse
No announcement yet.

DCS F-14A - RWR Upgrades & Development

Collapse
This is a sticky topic.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    DCS F-14A - RWR Upgrades & Development

    Hi Everyone,

    As the team continues to work hard on getting the F-14A ready for primetime, we thought we'd start off by talking a little more about one of the core upgrades we're making for this variant of the aircraft!

    Our RWR simulation for the F-14B is one of, what we consider, the crowning jewels of our F-14 product. However, we always feel like we can take a step further, and developing the ALR-45 for the F-14A provides us with exactly that opportunity. As a refresher, if you haven't seen or don't quite remember one of our development snapshot updates on the ALR-67, check it out HERE.


    RWR – basic principles of operation
    Let’s start from a short recap of how a typical aircraft-mounted RWR works. An aircraft has at least four antennas attached to its body. These antennas are spiral, wide field-of-view type. Their characteristic is such that the closer the direction of the emitter to the antenna direction of observation, the stronger the received signal is. The four antennas are connected to the central processing unit. When an electromagnetic signal is registered, the RWR compares the strength of the signal recorder by the antennas. Based on that, it computes the direction of the emitter and displays that information to the crew. More advanced devices can compare the signal characteristics with a database of known emitter types, and present that information together with the direction..

    A not so powerful crystal ball
    A typical RWR is quite good at letting the crew know that there’s a radar emitter. However, it struggles at providing precise information on the distance, elevation, and what is the target of interest for that emitter. Additionally, the calculated direction is usually inaccurate. An RWR doesn’t know if a threat is above or below. It has no way of telling if it observed the main lobe or a side lobe; or what was the threat’s radar power of the emitter. It must assume many factors and combine that into the most accurate yet the most pessimistic (or conservative) picture. It is better to warn about a threat that isn’t there, rather than to let the pilot fly into a deadly trap of an enemy SAM by hiding some weak and ambiguous signals.

    The ALR-45/50 and the ALR-67 – a two-generation leap
    The Heatblur F-14B is equipped with the ALR-67 – a standard modern RWR used by the US Navy in the ’90s. It combines over 30 years of experience in signal processing, computing, and intelligence and it represents the third generation of the radar warning receivers.
    On the other hand, the standard equipment on the F-14A since it entered the fleet was the ALR-45 radar warning receiver with the ALR-50 missile warning receiver. This set was introduced to the fleet in the early ‘70s, and it represented the dusk of the first generation of the radar warning receivers. While the capabilities of the ALR-45/50 were sufficient for the end of the Vietnam War Era, they became annoyingly inadequate in the ‘90s.

    Compared with the ALR-67, ALR-45/50 isn’t a full-digital RWR. The receiver wavelength spectrum is narrower (2-18 GHz) compared to the ALR-67 (0.5-20 GHz). The system is unable to perform threat identification or prioritization. Registered emissions are presented on a circular display as strobes, with the length of each strobe representing the strength of the signal. In addition to that, the RIO has a set of warning lights for selected threats: SA-2, SA-3, SA-4, SA-6, AI (airborne interceptor) and AAA. They are lit when a corresponding threat is detected.

    With the ALR-45/50, the information provided to the crew is limited and raw. It requires more experienced crew and more attention during a mission to build a similar level of situational awareness when compared with the ALR-67. On the other hand, a skilled RIO can benefit from being able to read raw signal readings and for example, estimate the distance to the threat from the length of the strobe.

    RWR model upgrade
    With the release of the F-14A, we will include the ALR-45/50 with its controls, display, and logic. In addition to that, we will also update the codebase common for both RWR's. The first and the most significant upgrade will be the new threat database containing updated emitter parameters such as frequency bands used by each radar and new beam parameters. The second change will be related to scan patterns and sidelobe emulation for different scan modes. The result should be a richer and more complex electromagnetic environment, particularly noticeable when observed on the ALR-45 scope.

    We combined our passion, experience, and knowledge to create the most realistic simulation of radar warning receivers for the Heatblur F-14. Once the F-14A is released, you’ll be able to try and compare the bare analogue ALR-45/50 and the modern and all-digital ALR-67 on the F-14B. No matter which one you choose, we hope that our RWR will let you return safely from any combat mission, but most importantly, give you an in-depth, realistic representation of RWR's as found in these two legendary aircraft!

    Nicholas Dackard

    Founder & Lead Artist
    Heatblur Simulations

    https://www.facebook.com/heatblur/

    #2
    Sounds awesome. Looking forward to work with this tech!

    Question:
    Originally posted by Cobra847 View Post
    With the release of the F-14A, we will include the ALR-45/50 with its controls, display, and logic. In addition to that, we will also update the codebase common for both RWR's. The first and the most significant upgrade will be the new threat database containing updated emitter parameters such as frequency bands used by each radar and new beam parameters.
    Is this database the same that is used by the Viggen's RWR and ELINT Pod or do you at Heatblur maintain different threat databases (with emitter frequencies and such) for the Tomcats and the Viggen?
    Last edited 10-08-2020, 09:45 PM.
    Intel i7-4790K @ 4x4GHz + 16 GB DDR3 + Nvidia Geforce RTX 2080 (8 GB VRAM) + M.2 SSD + Windows 10 64Bit

    DCS Panavia Tornado (IDS) really needs to be a thing!

    Comment


      #3
      In the azimuth representation, what does the different lines mean? I imagine the type of line (continous/long dashed/short dashed etc) is tied to the frequency of the emitter, so that one can have an idea of what the threat is at a glance?

      Comment


        #4
        Top notch as always. Looking forward to it!
        "It's amazing, even at the Formula 1 level how many drivers still think the brakes are for slowing the car down."

        VF-2 Bounty Hunters
        sigpic
        Virtual Carrier Strike Group 1 | Discord

        Comment


          #5
          nice

          Radar/PRF audio perhaps?

          Comment


            #6
            Some years ago you showed a preview of the ALR-45 that used a different type of display which is more advanced than this one you are presenting here but still not as good as the fully digital ALR-67 in the F-14B:



            Will this one still be available as an option or has it been rolled back in favour of the earlier spec? I would like to know more about these and how they were employed (if this later type was a later retrofit but only present in low numbers for example).

            Thanks.

            Comment


              #7
              That doesn't look like the RWR display in the corner, it looks like a display mode on the TID, judging by the stick in front of it.

              Comment


                #8
                Originally posted by Slant View Post
                That doesn't look like the RWR display in the corner, it looks like a display mode on the TID, judging by the stick in front of it.
                It will be on pilot's HSD (switchable) afaik.
                G4560@3,5GHz/DDR4-16GB/GTX970-4GB/SATA3-SSD, Win7-64, 27"LCD-FullHD, T16000M HOTAS, customTiR
                Aircraft: FC3, F-14B
                / Supercarrier / Maps: NTTR, PG

                Comment


                  #9
                  So glad Heatblur are giving us the -A. I mean I still prefer (and will continue to drive) the B but the A opens up a lot of scenarios which are used online where the B is used as a stand in for the Iranian Airforce. DCS is severely lacking in REDFOR aircraft as we all know and another superiority fighter which can (plausibly) serve on the RED side is very, very welcome. KUDOS to the team!
                  Current specs: Windows 10 Home 64bit, i5-9600K @ 3.7 Ghz, 32GB DDR4 RAM, 1TB Samsung EVO 860 M.2 SSD, GAINWARD RTX2060 6GB, Oculus Rift S, MS FFB2 Sidewinder + Warthog Throttle Quadrant, Saitek Pro rudder pedals.

                  Comment


                    #10
                    Sounds great.

                    Is the ALR-45 capable of identifying and filtering emissions of friendly platforms?

                    Comment


                      #11
                      Uuh, so much porn ..gimme more !

                      Cold war bird's sooo sexy and full of anal,og gauges.
                      Oculus CV1, Odyssey, Pimax 5k+ (i5 8400, 24gb ddr4 3000mhz, 1080Ti OC )


                      sigpic

                      Comment


                        #12
                        Originally posted by TLTeo View Post
                        In the azimuth representation, what does the different lines mean? I imagine the type of line (continous/long dashed/short dashed etc) is tied to the frequency of the emitter, so that one can have an idea of what the threat is at a glance?
                        At least on the predecessor, the late sixties' APR-25, the line type indicated one of the three supported frequency bands (Older and newer Fan Song and Low Blow), and there were some indicator lights to further refine that information. Gun radars were seen on the lowest band with an additional triple-A warning light; aircraft radars showed up on the highest SA-3 band with two lights indicating either a gunsight ranging or an "all-weather" modern radar. It definitely required some operator skill, but the signal environment was rather simple back then, too.

                        I believe the threat classification capability of ALR-45 to be somewhere between APR-25 and the later ALR-67.

                        That video is seriously worth watching if you're ever wondered how RWR systems work.

                        Comment


                          #13
                          Originally posted by andyn View Post
                          At least on the predecessor, the late sixties' APR-25, the line type indicated one of the three supported frequency bands (Older and newer Fan Song and Low Blow), and there were some indicator lights to further refine that information. Gun radars were seen on the lowest band with an additional triple-A warning light; aircraft radars showed up on the highest SA-3 band with two lights indicating either a gunsight ranging or an "all-weather" modern radar. It definitely required some operator skill, but the signal environment was rather simple back then, too.

                          I believe the threat classification capability of ALR-45 to be somewhere between APR-25 and the later ALR-67.

                          That video is seriously worth watching if you're ever wondered how RWR systems work.
                          Good lord that is a ridiculous system. Thank god im the pilot and not the rio- Ill let my buddy figure that one out.

                          Comment


                            #14
                            Originally posted by Cobra847 View Post
                            The first and the most significant upgrade will be the new threat database containing updated emitter parameters such as frequency bands used by each radar and new beam parameters. The second change will be related to scan patterns and sidelobe emulation for different scan modes.
                            Will that means that we will have a sound for each type of radar emission to identify each kind?

                            I dont know if this RWR did that, but other wise how could you discern between a Mig29 vs a F18 for example
                            Last edited 10-09-2020, 07:29 PM.

                            Comment


                              #15
                              what is dash line and dot line meaning in RWR display?
                              I7-4790K | RTX2070 | Thrustmaster Hotas Warthog | 24G DDR3 | 東芝 TOSHIBA HG5d M.2 256GB SSD | Q200 EX

                              Comment


                                #16
                                Originally posted by Alphabet_Ghost View Post
                                what is dash line and dot line meaning in RWR display?

                                These lines show different emitter types and signal strenghth from the emitter to you. The ALR-45 tells you wether you are being locked up by a SAM, AAA or an AI radar emitter. Sadly, I forgot which type of line stands for what. Someone else needs to jump in here. But on older systems like the APR-25 I think a dashed line was for X-band emitter meaning AI radar, the solid line was S-band and meaning SAM emitter or AAA and the dotted line was C-band for other stuff. Not sure for the ALR-45, though. Anyway, this is combined with raw audio of the emitter painting you in it's current operating frequency. You can also tell by the raw audio from the emitter which type of emitter exactly is painting you, i.e. an SA-2 or a MiG-21. The longer the lines get that you see on the RWR display passing through the rings, the closer the threat is to you. A three ringer usually means the threat is close and ready to launch on you whereas a one ringer just sees you on his scope but is no threat because he is probably quite some distance away from you. There are some exceptions to this but this would go beyond the scope here. On older Vietnam style RWRs you could also more or less safely determine when you passed over a SAM or AAA emitter as the line to the threat would start to twist on the display. Don't know if that's a thing with the ALR-45, though. I hope this helps understanding what you actually see on that type of RWR.
                                Last edited 10-10-2020, 04:36 PM.

                                Comment


                                  #17
                                  Originally posted by Tango3B View Post
                                  These lines show different emitter types and signal strenghth from the emitter to you. The ALR-45 tells you wether you are being locked up by a SAM, AAA or an AI radar emitter. Sadly, I forgot which type of line stands for what. Someone else needs to jump in here. But on older systems like the APR-25 I think a dashed line was for X-band emitter meaning AI radar, the solid line was S-band and meaning SAM emitter or AAA and the dotted line was C-band for other stuff. Not sure for the ALR-45, though. Anyway, this is combined with raw audio of the emitter painting you in it's current operating frequency. You can also tell by the raw audio from the emitter which type of emitter exactly is painting you, i.e. an SA-2 or a MiG-21. The longer the lines get that you see on the RWR display passing through the rings, the closer the threat is to you. A three ringer usually means the threat is close and ready to launch on you whereas a one ringer just sees you on his scope but is no threat because he is probably quite some distance away from you. There are some exceptions to this but this would go beyond the scope here. On older Vietnam style RWRs you could also more or less safely determine when you passed over a SAM or AAA emitter as the line to the threat would start to twist on the display. Don't know if that's a thing with the ALR-45, though. I hope this helps understanding what you actually see on that type of RWR.
                                  thanks for detailed reply!
                                  I7-4790K | RTX2070 | Thrustmaster Hotas Warthog | 24G DDR3 | 東芝 TOSHIBA HG5d M.2 256GB SSD | Q200 EX

                                  Comment


                                    #18
                                    Originally posted by draconus View Post
                                    It will be on pilot's HSD (switchable) afaik.
                                    <EDITED out>
                                    Forget it, my bad!
                                    Current modules:
                                    FC3, Mirage 2000C, Harrier AV-8B NA, F-5, AJS-37 Viggen, F-14B, Combined Arms, F/A-18C, F-16C, MiG-19P, F-86, FW-190A, Spitfire Mk IX, UH-1 Huey, Su-25, P-51PD, Caucasus map, Nevada map, Persian Gulf map......ah yes, forgot the Super Carrier! Shows you how often i fly these days....

                                    Modules in waiting: F-14A, MiG-23, F-4U, F-8, Falklands Map


                                    Wish list: South East Asia map, F-4J/N, A-6, F-15A/C, Su-27, Sea Harrier FRS.1, Mirage III, MiG-17.

                                    Comment


                                      #19
                                      Originally posted by SuperEtendard View Post
                                      Some years ago you showed a preview of the ALR-45 that used a different type of display which is more advanced than this one you are presenting here but still not as good as the fully digital ALR-67 in the F-14B:



                                      Will this one still be available as an option or has it been rolled back in favour of the earlier spec? I would like to know more about these and how they were employed (if this later type was a later retrofit but only present in low numbers for example).

                                      Thanks.
                                      That was an early misunderstanding on our part. That is the later integration of the AN/ALR-67 which was possible from the PTID and onwards as that upgrade added the 1553-bus.

                                      The AN/ALR-45 we're doing and that both use the HSD and ECMD as displays though. But the information shown on the displays is different.

                                      Comment


                                        #20
                                        Originally posted by Naquaii View Post
                                        That was an early misunderstanding on our part. That is the later integration of the AN/ALR-67 which was possible from the PTID and onwards as that upgrade added the 1553-bus.

                                        The AN/ALR-45 we're doing and that both use the HSD and ECMD as displays though. But the information shown on the displays is different.
                                        Both -B(with PTID upgrade -B)and -BU are added 1553bus?

                                        mind to explain dash and dotted line meaning?what kind of different between HSD and ECMD(MDI)?
                                        I7-4790K | RTX2070 | Thrustmaster Hotas Warthog | 24G DDR3 | 東芝 TOSHIBA HG5d M.2 256GB SSD | Q200 EX

                                        Comment

                                        Working...
                                        X