anchor.diff:  KH02,H02,,High Island 334A,LA,US,28.06,-93.4,30,7,h02
   ,,,915028,,,6.1,171.8,0,7,915028
   KGMU,GMU,,Greenville Downtown,SC,US,34.85,-82.35,315,5,kgmu
  -YMML,,94866,Melbourne Intl A,,AU,-37.6666666667,144.816666667,141,6,948660
  +YMML,,94866,Melbourne Intl,,AU,-37.6666666667,144.816666667,141,6,948660
   KEWB,EWB,,New Bedford,MA,US,41.69,-70.97,23,7,kewb
   ,,,lm1,,,45.33,-86.42,177,7,lm1
   ,,,915006,,,8.3,137.5,0,7,915006
  
positive.code: KRFD,RFD,72543,Rockford,IL,US,42.21,-89.1,221,4,krfd
  MPMG,,,Marcos Gelabert,,PA,8.98333333333,-79.5666666667,13,7,mpmg
  FJDG,,61967,Diego Garcia,,MU,-7.3,72.4,3,6,619670
  KSWF,SWF,,Stewart/Newburgh,NY,US,41.51,-74.1,150,6,kswf
  MMAA,ACA,,Acapulco/Gen Alvarez,,MX,16.77,-99.75,5,3,mmaa
  LIRF,,16242,Rome/Fiumicino,,IT,41.7833333333,12.2166666667,3,6,162420
  KBVX,BVX,,Batesville,AR,US,35.73,-91.65,141,7,kbvx
  ,,,g001,,,47.5,-121.1,1453,7,g001
  CYXE,YXE,71866,Saskatoon,SK,CA,52.18,-106.7,504,5,cyxe
  ,,,000353,,,36.14,-120.35,312,7,000353
  KGLD,GLD,72465,Goodland/Renner,KS,US,39.38,-101.7,1113,3,kgld
  ,,,000722,,,33.46,-80.85,59,7,000722
  SCEL,,85574,Pudahuel/Arturo,,CL,-33.3666666667,-70.7666666667,476,6,855740
  ,,12843,Budapest/Lorinc,,HU,47.4333333333,19.1833333333,140,8,128430
  KRNK,RNK,72318,Roanoke/Blacksbg,VA,US,37.2,-80.4,648,8,krnk
  ,,,Granger Kgrk 88D,TX,US,30.72,-97.38,182,8,hoo
  KLAN,LAN,72539,Lansing/Capital,MI,US,42.78,-84.6,264,4,klan
  KSUX,SUX,72557,Sioux City Muni,IA,US,42.41,-96.38,338,3,ksux
  CYQQ,YQQ,71893,Comox,BC,CA,49.73,-124.9,24,6,cyqq
  KRDD,RDD,72592,Redding Muni,CA,US,40.51,-122.3,155,3,rdd
  KTTD,TTD,,Portland-Troutdale,OR,US,45.55,-122.4,14,6,kttd
  KREO,REO,,Rome,OR,US,42.58,-117.89,1235,6,reo
  KP11,P11,72758,Devils Lake,ND,US,48.11,-98.87,443,7,kp11
  ,,,000742,,,42.46,-75.06,470,7,000742
  PASI,SIT,70371,Sitka/Japonski,AK,US,57.07,-135.35,5,6,pasi
  ,,,kbnv,,,40.2,-113.3,1331,7,kbnv
  KDNR,DNR,72469,Denver/Stapleton,CO,US,39.75,-104.866666667,1608,8,724698
  KBIS,BIS,72764,Bismarck Muni,ND,US,46.78,-100.75,505,0,kbis
  ,,,000944,,,35.6,-73.8,0,7,000944
  MWCR,,78384,Owen Roberts,Grand Cayman,KY,19.28,-81.35,3,5,mwcr
  ,,,000960,,,29.6,-117.0,0,7,000960
  KRDU,RDU,72306,Raleigh-Durham,NC,US,35.88,-78.78,130,2,723066
  ,,,000730,,,43.33,-120.84,1350,7,000730
  KCRW,CRW,72414,Charleston/Kanaw,WV,US,38.38,-81.6,309,6,kcrw
  YSCB,,94926,Canberra (Civ/Mi,,AU,-35.2833333333,149.166666667,577,6,949260
  ,,15001,Avrameni,,RO,48.0166666667,26.95,240,8,915001
  KCHO,CHO,,Charlottesville-Albemarle,VA,US,38.14,-78.45,192,6,kcho
  CWPH,WPH,,Inukjuak,QB,CA,58.46,-78.12,253,8,cwph
  ,,,estc,,,47.46,-69.22,264,7,estc
  KMPX,MPX,72649,Chanhassen,MN,US,44.85,-93.5666666667,288,8,mpx
  ,,,c7h,,,38.5,-70.7,0,7,c7h
  ,,,000294,,,39.0,-123.12,165,7,000294
  MMMA,MAM,,Matamoros Intl,,MX,25.77,-97.53,8,6,mmma
  KBWI,BWI,72406,Baltimore/Wash I,MD,US,39.19,-76.67,59,3,kbwi
  ,,,000269,,,30.59,-100.65,691,7,000269
  ,,,000230,,,47.66,-90.91,463,7,000230
  OIII,,40754,Tehran/Mehrabad,,IR,35.6833333333,51.3,1191,6,407540
  OMDB,,41194,Dubai Intl Airpo,,AE,25.25,55.3666666667,5,6,411940
  PACV,CDV,70296,Cordova/Mile 13,AK,US,60.5,-145.5,12,6,pacv
  ,,,999320,,,19.1,72.8,8,7,999320
  ,,,c22,,,47.5,-99.0,461,7,c22
  KMEM,MEM,72334,Memphis Intl,TN,US,35.04,-89.98,86,2,kmem
  KBFI,BFI,,Seattle/Boeing Fld/King Co Intl,WA,US,47.53,-122.3,4,1,kbfi
  KALB,ALB,72518,Albany County,NY,US,42.76,-73.8,92,3,kalb
  PTKK,,91334,Truk Intl/Moen Is,,FM,7.47,151.85,2,5,913340
  ,,,a#2,,,74.3,-156.6,0,7,a#2
  CYCX,YCX,71701,Gagetown,NB,CA,45.84,-66.43,51,6,cycx
  ,,,g#a,,,23.3,-95.6,0,7,g#a
  ,,,u#c,,,66.17,-169.83,7,7,u#c
  KPHP,PHP,,Philip,SD,US,44.05,-101.6,672,7,php
  KMFE,MFE,,Mcallen/Miller Intl,TX,US,26.18,-98.24,38,6,kmfe
  SBBV,,82022,Boa Vista (Civ/M,,BR,2.85,-60.7,140,5,820220
  ,,,000948,,,48.1,-130.5,0,7,000948
  KGFK,GFK,,Grand Forks Intl,ND,US,47.96,-97.18,258,2,kgfk
  CYHM,YHM,71263,Hamilton Airport,ON,CA,43.17,-79.94,238,6,cyhm
  
negative.code: ,,,nw8,,,44.6,-127.5,0,7,nw8
  TBPB,,78954,Barbados,Grantley Adams Intl,BB,13.07,-59.48,52,8,tbpb
  ,,,000942,,,37.3,-70.1,0,7,000942
  KMOB,MOB,72223,Mobile/Bates Field,AL,US,30.68,-88.25,63,3,kmob
  PATO,POR,,Portage Glacier,AK,US,60.79,-148.83,31,7,por
  ,,,000956,,,36.4,-125.4,0,7,000956
  KFWA,FWA,72533,Fort Wayne,IN,US,41.01,-85.2,248,3,kfwa
  CYTL,YTL,71848,Big Trout Lake,ON,CA,53.83,-89.87,224,6,cytl
  KFKL,FKL,,Franklin,PA,US,41.39,-79.87,469,6,kfkl
  ,,,b#l,,,57.0,-177.7,0,7,b#l
  