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All Forums >> [New Releases from Matrix Games] >> War in the Pacific: Admiral's Edition >> Scenario Design and Modding >> Axis Radar Reference Tool Page: [1]
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Axis Radar Reference Tool - 3/9/2019 10:24:29 PM   
el cid again

 

Posts: 16576
Joined: 10/10/2005
Status: offline
From The Invention That Changed the World, Pp. 240241:"Kinjiro Okabe...had developed a continuous wave Doppler radar in 1936."

[I think this was the first deployed radar system in the world.  It was in widespread use by 1939.]

"The Army and Navy did not even turn to pulsed systems until May 1941, when an observation group visiting Germany
heard reports of British radar.  Especially startled, the Imperial Navy quickly launched  development of both meter
wave and centimeter models. [Japan appears to have developed the cavity magnetron first, before the British or
French did, but they originally were after microwave communications - something we have come to appreciate. 
Still - its development they could apply it to radar when finally they decided they wanted radar.  Navy Type 2 Radar
was probably the first mass produced microwave radar in operational use.]

"In November, 1941, just before Pearl Harbor, a three meter early warning set [Type 11 ASEW]took up duty on the
Japanese coast at Katsuura [Chiba Preficture], some sixty miles southeast of Tokyo." I had to change the
availability date of Type 11 radar for this reason. Technical evaluation led me to modify the ranges of the Type A
Radars - the 'continuous wave' radar referred to in the first item.  There are two kinds.  Both have the official
acronym BDID.  BDID Doppler Electromagnetic (continuous) Wave Early Warning Radar has a range of 252 thousand
yards (precisely three hexes) while its larger cousin BIDD Doppler EW Okii ("large") has a range of 756 thousand
yards (or nine hexes).  This set has a massive longwave antenna and is rated as static - turning any unit is
assigned to into a static unit even if it otherwise isn't static.  These ranges are not quite correct - both are
adjusted to work with 42 nautical mile (84 kyard) hexes.  Note these ranges are very large - rivaling EW radars
of later design.  But they are not as useful.  I have rated accuracy as only 1 - the minimum possible value. 
However, I have learned that the normal criticism - including by the author of the book above - is misleading. 
Continuous wave interference detectors DO help one understand both raid size and location in two senses: 1) The
duration of the interference was interpreted as raid size. This turned out to be reliable and useful even late in
the war.  Japan never failed to sound air raid sirens less than two hours before a major raid (according to POWs
and diplomats resident in Japan).2) The location of the interference must be on an ellipse in which the two
stations are the focal points.  This ellipse would be plotted on an aeronautical chart.  If the station had
multiple sets (operating in pairs with distant stations) - as was common - there would be two to four such
ellipses on the chart.  These, plus lines from likely raid sources, often permitted a reasonable estimate of
where the raids had to be?Except for the one station described above, there was no Type B (pulsed radar) in
Japan when the game starts.  So it took work to change this to hundreds of radars by midwar.  This was done by
having some other detection devices upgrade, or by defining a later formation that included the radar.  Generally,
some optical spotters were replaced with "searchlight" or "fire control" radars - these also being actually air
search radars of limited range when in acquisition mode.  I found an astonishing number of Allied radars.  These
often appear not to be used, so I will review them. As with Japan, we will create upgrade paths so over time units
will get better sets.  But the basic situation is that the game already has a simplified set of the allied radars.

Aircraft radars have all been reviewed and generally are on the correct aircraft. I will review them again
eventually, but not soon.  I did add a couple of Allied types last week because they were misclassified as
nav radars.  Since they search as airborne surface search, and since nav radar in game has no effect, I
reclassified them as ASS.



< Message edited by el cid again -- 3/21/2019 5:13:30 PM >
Post #: 1
RE: Axis Radar Reference Tool (Left 6 columns) - 3/9/2019 10:32:33 PM   
el cid again

 

Posts: 16576
Joined: 10/10/2005
Status: offline
Short Designation Radar Type Slot Service Range Start Date [REVISED DATA]

Short Designation Radar Type Slot Service Range (kyards) Start Date End Date Upgrade Effect Accuracy Weight Power Ceiling Device Long Designation Build Rate Pool Notes
Axis Acft Observer Optical Air Search 1492 IJA 20 4112 None None 10 20 1 None 20000 IJA Aircraft Observer Network 10 10 One Observation Post
Axis Arty Spotter Optical Air Search 715 IJA 30 4112 None None 10 40 1 None 10000 IJA Aircraft Observer Network 30 30 One Observation Post
BDID DpplrEW Okii Surface Air Search 140 IJA 756 4112 None None 40 1 2 400 w 50000 "Big" Type Ko Doppler EW Radar 1 1 Electromagnet Wave Interference Detector
BDID DpplrEW Radar Surface Air Search 1461 IJA 252 4112 None None 35 1 1 100 w 50000 Type Ko ("A") Doppler EW Radar 3 3 Electromagnet Wave Interference Detector
IJA Acft Observer Net Optical Air Search 1466 IJA 20 4112 None None 40 20 4 None 20000 IJA Aircraft Observer Network 5 5 Four Observation Post Phone Network
IJA Tp90 SD Chiisai Acoustic Detector 1470 IJA 20 4112 None None 10 10 1 None 25000 Type 90 Chaisai (Small) Sound Det. 6 6 Four Horn Array
IJA Tp90 SD Okii Acoustic Detector 1460 IJA 30 4112 4212 143 15 10 2 None 30000 Type 90 Okii (Large) Sound Det. 3 3 Five Horn Array
IJN Acft Observer Net Optical Air Search 1472 IJN 20 4112 None None 40 20 4 None 20000 IJA Aircraft Observer Network 2 2 Four Observation Post Phone Network
IJN Tp90 SD Chiisai Acoustic Detector 1473 IJN 20 4112 4412 131 10 10 1 None 25000 Type 90 Chaisai (Small) Sound Det. 5 5 Four Horn Array
JAAF Tp90 SD Okii Acoustic Detector 1467 JAAF 30 4112 4306 142 15 10 2 None 25000 Type 90 Chaisai (Small) Sound Det. 4 4 Five Horn Array
Searchlight (J) Optical Air Search 792 All 9 4112 None None 1 2 1 None 27000 IJA Aircraft Observer Network 10 100 One Observation Post
Seetakt SSFC Surface SSFC 1766 KM 120 4112 None None 60 60 1 8 kw 10000 Seetakt D1 Surface Search & GFC 0 0 Ship Surface Search and Fire Control
Ta Chi 1 ASSL Radar Surface AASL 139 IJA 22 4301 4310 141 40 50 1 10 kw 60000 Ta Chi 1 SearchLight Radar 1 / 0 JES 0 Aircraft Acquisition and Searchlight Enhancement*
Ta Chi 2 ASSL Radar Surface AASL 143 IJA 22 4301 4310 141 40 55 3 10 kw 60000 Ta Chi 2 SearchLight Radar 1 / 2 JES 0 Aircraft Acquisition and Searchlight Enhancement*
Ta Chi 3 ASSL Radar Surface AASL 142 IJA 44 4307 4310 141 45 60 4 50 kw 60000 Ta Chi 3 SearchLight Radar 3 0 Aircraft Acquisition and Searchlight Enhancement**
Ta Chi 4 ASFC Radar Surface AAFC 141 IJA 22 4311 4407 138 45 60 3 10 kw 60000 Ta Chi 4 Acquisition & AAA 3 / 6 JES 0 Aircraft Acquisition and AAA Fire Control
Ta Chi 6m1 ASEW Radar Surface Air Search 1462 IJA 219 4206 4208 1463 45 45 72 50 kw 50000 Ta Chi 6 Model 1 ASEW Radar 2 0 Land EW Type Otsu ("B") Pulse Radar ****
Ta Chi 6m2 ASEW Radar Surface Air Search 1463 IJA 219 4209 4211 1464 45 45 66 50 kw 50000 Ta Chi 6 Model 2 ASEW Radar 4 0 Land EW Type Otsu ("B") Pulse Radar
Ta Chi 6m3 ASEW Radar Surface Air Search 1464 IJA 328 4212 4303 1471 50 45 62 50 kw 50000 Ta Chi 6 Model 3 ASEW Radar 6 0 Land EW Type Otsu ("B") Pulse Radar
Ta Chi 6m4 ASEW Radar Surface Air Search 1471 IJA 328 4304 4401 1468 50 45 60 50 kw 50000 Ta Chi 6 Model 4 AEWS Radar 8 0 Land EW Type Otsu ("B") Pulse Radar
Ta Chi 7 ASEW Radar Surface Air Search 1465 IJA 328 4310 4401 1468 50 45 18 50 kw 50000 Ta Chi 7 Air Search EW Radar 3 0 Transportable versuib if Ta Chi 6 Model 3
Ta Chi 18 ASEW Radar Surface Air Search 1468 IJA 328 4402 4502 1469 50 50 4 50 kw 50000 Tac Chi 18 ASEW Radar 10 0 Land Type Otsu ("B") Pulse Radar
Ta Chi 24 ASFC Radar Surface AAFC 1487 IJA 32 4507 None None 70 85 2 10 kw 60000 Ta Cha 24 Acqisition & AAA 12 0 Aircraft Acquisition and AAA Fire Control***
Ta Chi 31 ASFC Radar Surface AAFC 138 IJA 22 4408 4506 1487 55 60 3 10 kw 60000 Ta Chi 31 Acquisition & AAA 3 / 6 JES 0 Aircraft Acquisition and AAA Fire Control
Ta Chi 35 ASHF Surface Air Search 1469 IJA 328 4503 None None 50 80 4 50 kw 50000 Tac Chi 35 ASEW Radar 10 0 Land Height Finding Air Search Radar
Ta Se 1 AS Radar Surface Air Search 137 IJA 328 4302 None None 55 45 4 50 kw 50000 Ta Se 1 ASEW Search Radar 2 0 Aircraft warning for large Army ships
Ta Se 2 SS Radar Surface Air Search 136 IJA 33 4307 None None 60 75 2 1 kw 10000 Ta Se 2 Surface Search Radar 4 JES ONLY 0 Surface and submarine warning for Army ships
Ta Se 10 AS Radar Surface Air Search 135 IJA 55 4401 None None 55 40 1 10 kw 30000 Ta Se 10 Air Search Radar 4 0 Aircraft warning for small Army vessels
Type 11 ASEW Radar Surface Air Search 1701 IJN 273 4112 4302 134 50 45 9 40 kw 50000 Type 11 Air Search EW Radar 0 / 1 JES 0 Ship EW Type Otsu ("B") Pulse Radar
Type 12 ASEW Radar Surface Air Search 1474 IJN 109 4212 4302 134 50 45 6 5 kw 50000 Type 12 Air Search EW Radar 1 0 Ship EW Type Otsu ("B") Pulse Radar
Type 13 ASEW Radar Surface Air Search 134 IJN 109 4303 4504 1475 45 50 1 10 kw 30000 Type 13 Air Search EW Radar 12 0 Ship EW Type Otsu ("B") Pulse Radar
Type 14 ASEW Radar Surface Air Search 1475 IJN 393 4505 None None 60 45 30 100 kw 50000 Type 14 Air Search EW Radar 0 / 1 JES 0 Ship EW Type Otsu ("B") Pulse Radar
Type 21 AS Mode SS/AS Radar***** 1702 IJN 152 4204 None None 35 40 1 5 kw 30000 Type 21 Radar AS Mode 1 /2 JES 0 Ship EW Type Otsu ("B") Pulse Radar*****
Type 21 SS Mode SS/AS Radar***** 133 IJN 32 4204 None None 45 40 1 5 kw 30000 Type 21 Radar SS Mode 1 /2 JES 0 Ship EW Type Otsu ("B") Pulse Radar*****
Type 22 SSFC Surface SSFC 1703 IJN 38 4203 4408 1801 50 50 1 2 kw 10000 Type 22 Surface Search & GFC 3 / 4 JES 0 Land & Ship Surface Search and Fire Control
Type 31 SSFC Radar Surface SSFC 1802 IJN 38 4503 None None 70 90 1 2 kw 10000 Type 31 Surface Search & GFC 3 / 4 JES 0 Land & Ship Surface Search and Fire Control
Type 32 SSFC Radar Surface SSFC 1801 IJN 38 4409 None None 70 85 1 2 kw 10000 Type 32 Surface Search & GFC 3 / 4 JES 0 Land & Ship Surface Search and Fire Control
Type 32A ASFC Radar Surface ASFC 131 IJN 66 4501 None None 80 95 1 6 kw 60000 Type 32Mod3S8A AS & AAA 2 / 3 JES 0 Land & Ship Acquisition and AAA Fire Control
Type 32B ASFC Radar Surface ASFC 223 IJN 85 4505 None None 85 95 1 10 kw 60000 Type 32Mod3S8B AS & AAA 1 / 2 JES 0 Land & Ship Acquisition and AAA Fire Control
Type 33 SSFC Radar Surrace SSFC 339 IJN 14 4408 None None 75 80 1 2 kw 10000 Type 33 Surface Search & GFC 2 / 4 JES 0 Small Vessel Surface Search and Fire Control&
Type 41 ASFC Radar Surface ASFC 332 IJN 44 4308 4409 335 45 60 5 13 kw 60000 Type 41 Acquisition & AAA 2 0 Land & Ship Acquisition and AAA Fire Control*
Type 42 ASFC Radar Surface ASFC 335 IJN 44 4410 4505 336 45 65 5 13 kw 60000 Type 42 Acquisition & AAA 2 0 Land & Ship Acquisition and AAA Fire Control
Type 43 ASFC Radar Surface ASFC 336 IJN 44 4507 None None 55 65 5 13 kw 60000 Type 42 Acquisition & AAA 12 0 Land & Ship Acquisition and AAA Fire Control


* Developed from SCR-268 captured in the Philippines. & Type 24 is a Wurzburg substituting a magnitron for a klystron tube.
** Developed from GL Mark II captured at Singapore.
*** Developed from German Wurzburg.
**** Developed from SCR-270 captured in the Philippines.
*****Radar listed in both modes, but represents only one equipment. Originally developed for land use, redesignated for ship use. Often used in passive mode to detect enemy radars.


< Message edited by el cid again -- 3/21/2019 5:18:25 PM >

(in reply to el cid again)
Post #: 2
RE: Axis Radar Reference Tool - 3/9/2019 10:38:58 PM   
el cid again

 

Posts: 16576
Joined: 10/10/2005
Status: offline
Radar abbreviations used as indicators of function in the name field are:

AD = Acoustic Detector
BDID Unknown Japanese acronym used officially for the Type A Doppler Radar (radio interference detectors).
AS = Air Search
ASEW = Air Search Early Warning
ASFC = Air Search and Fire Control (for AA guns)
ASHF = Air Search and Height Finding (for Early Warning)
ASSL = Air Search Searchlight Radar (acquisition radar used to help searchlights find targets).
AS = Air Search
EW = Early Warning (short version of ASEW when there are not enough characters in the name for more).
SS = Surface Search
SSFC = Surface Search and Fire Control (for anti-ship guns or torpedoes)

< Message edited by el cid again -- 3/9/2019 10:46:46 PM >

(in reply to el cid again)
Post #: 3
RE: Axis Radar Reference Tool - 3/10/2019 2:00:29 PM   
m10bob


Posts: 8623
Joined: 11/3/2002
From: Dismal Seepage Indiana
Status: offline

quote:

ORIGINAL: el cid again

Radar abbreviations used as indicators of function in the name field are:

AD = Acoustic Detector
BDID Unknown Japanese acronym used officially for the Type A Doppler Radar (radio interference detectors).
AS = Air Search
ASEW = Air Search Early Warning
ASFC = Air Search and Fire Control (for AA guns)
ASHF = Air Search and Height Finding (for Early Warning)
ASSL = Air Search Searchlight Radar (acquisition radar used to help searchlights find targets).
AS = Air Search
EW = Early Warning (short version of ASEW when there are not enough characters in the name for more).
SS = Surface Search
SSFC = Surface Search and Fire Control (for anti-ship guns or torpedoes)



Thank you for this...

_____________________________




(in reply to el cid again)
Post #: 4
RE: Axis Radar Reference Tool - 3/21/2019 5:14:10 PM   
el cid again

 

Posts: 16576
Joined: 10/10/2005
Status: offline
From The Invention That Changed the World, Pp. 240241:"Kinjiro Okabe...had developed a continuous wave Doppler radar in 1936."

[I think this was the first deployed radar system in the world. It was in widespread use by 1939.]

"The Army and Navy did not even turn to pulsed systems until May 1941, when an observation group visiting Germany
heard reports of British radar. Especially startled, the Imperial Navy quickly launched development of both meter
wave and centimeter models. [Japan appears to have developed the cavity magnetron first, before the British or
French did, but they originally were after microwave communications - something we have come to appreciate.
Still - its development they could apply it to radar when finally they decided they wanted radar. Navy Type 2 Radar
was probably the first mass produced microwave radar in operational use.]

"In November, 1941, just before Pearl Harbor, a three meter early warning set [Type 11 ASEW]took up duty on the
Japanese coast at Katsuura [Chiba Preficture], some sixty miles southeast of Tokyo." I had to change the
availability date of Type 11 radar for this reason. Technical evaluation led me to modify the ranges of the Type A
Radars - the 'continuous wave' radar referred to in the first item. There are two kinds. Both have the official
acronym BDID. BDID Doppler Electromagnetic (continuous) Wave Early Warning Radar has a range of 252 thousand
yards (precisely three hexes) while its larger cousin BIDD Doppler EW Okii ("large") has a range of 756 thousand
yards (or nine hexes). This set has a massive longwave antenna and is rated as static - turning any unit is
assigned to into a static unit even if it otherwise isn't static. These ranges are not quite correct - both are
adjusted to work with 42 nautical mile (84 kyard) hexes. Note these ranges are very large - rivaling EW radars
of later design. But they are not as useful. I have rated accuracy as only 1 - the minimum possible value.
However, I have learned that the normal criticism - including by the author of the book above - is misleading.
Continuous wave interference detectors DO help one understand both raid size and location in two senses: 1) The
duration of the interference was interpreted as raid size. This turned out to be reliable and useful even late in
the war. Japan never failed to sound air raid sirens less than two hours before a major raid (according to POWs
and diplomats resident in Japan).2) The location of the interference must be on an ellipse in which the two
stations are the focal points. This ellipse would be plotted on an aeronautical chart. If the station had
multiple sets (operating in pairs with distant stations) - as was common - there would be two to four such
ellipses on the chart. These, plus lines from likely raid sources, often permitted a reasonable estimate of
where the raids had to be?Except for the one station described above, there was no Type B (pulsed radar) in
Japan when the game starts. So it took work to change this to hundreds of radars by midwar. This was done by
having some other detection devices upgrade, or by defining a later formation that included the radar. Generally,
some optical spotters were replaced with "searchlight" or "fire control" radars - these also being actually air
search radars of limited range when in acquisition mode. I found an astonishing number of Allied radars. These
often appear not to be used, so I will review them. As with Japan, we will create upgrade paths so over time units
will get better sets. But the basic situation is that the game already has a simplified set of the allied radars.

Aircraft radars have all been reviewed and generally are on the correct aircraft. I will review them again
eventually, but not soon. I did add a couple of Allied types last week because they were misclassified as
nav radars. Since they search as airborne surface search, and since nav radar in game has no effect, I
reclassified them as ASS.



(in reply to el cid again)
Post #: 5
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