<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 17:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.11 (284) 17:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202628410111700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.528" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.963" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.202" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.272" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="384.269" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="289.327" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.797" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="127.602" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.817" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.504" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="175.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.080" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 341.667 343.333 345.000 350.000 350.000 350.000 355.000 355.000 355.000 357.000 359.000 361.000 363.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 381.200 382.400 383.600 384.800 386.000 387.200 388.400 389.600 390.800 392.000 393.200 394.400 395.600 396.800 398.000 399.200 400.400 401.600 402.800 404.000 405.200 406.400 407.600 408.800 410.000 411.200 412.400 413.600 414.800 416.000 417.200 418.400 419.600 420.800 422.000 423.200 424.400 425.600 426.800 428.000 429.200 430.400 431.600 432.800 434.000 435.200 436.400 437.600 438.800 440.000 441.200 442.400 443.600 444.800 446.000 447.200 448.400 449.600 450.800 452.000 453.200 454.400 455.600 456.800 458.000 459.200 460.400 461.600 462.800 464.000 465.200 466.400 467.600 468.800 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 514.361 519.139 524.397 530.212 536.676 543.906 552.044 561.275 571.833 584.028 598.273 615.131 635.393
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 54 54 57 57 57 57 54 0 48 0 0 48 57 60 63 69 75 75 72 78 78 72 78 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 63 51 60 63 45 54 60 54 60 54 60 57 63 63 69 69 63 63 57 51 51 51 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.953125 -0.390625 -0.390625 -2.734375 -0.390625 1.953125 -1.171875 -1.171875 -2.734375 0.390625 2.734375 2.734375 1.953125 2.734375 -0.390625 1.953125 1.171875 0.390625 -0.390625 -0.390625 -2.734375 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 -0.390625 1.171875 -1.953125 2.734375 1.953125 1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.513 90.0 95.0 100.0 105.0 110.0 112.336 114.672 115.0 117.008 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.269 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.153 2.771 3.098 3.202 3.08 3.08 3.097 3.202 3.322 3.508 3.68 3.843 3.998 4.148 4.294 4.437 4.578 4.718 4.856 4.994 5.132 5.27 5.409 5.548 5.689 5.83 5.974 6.119 6.266 6.415 6.567 6.722 6.88 7.041 7.206 7.375 7.548 7.725 7.907 8.094 8.287 8.485 8.69 8.9 9.117 9.341 9.57 9.805 10.044 10.288 10.532 10.776 11.015 11.245 11.462 11.66 11.836 11.985 12.103 12.187 12.237 12.25 12.25 12.243 12.225 12.196 12.158 12.111 12.054 11.99 11.918 11.838 11.752 11.659 11.56 11.456 11.347 11.233 11.115 10.993 10.867 10.739 10.607 10.473 10.337 10.199 10.06 9.919 9.777 9.634 9.491 9.347 9.203 9.059 8.914 8.77 8.627 8.484 8.342 8.2 8.06 7.92 7.781 7.644 7.508 7.373 7.24 7.108 6.977 6.848 6.721 6.595 6.471 6.348 6.227 6.108 5.991 5.875 5.761 5.649 5.538 5.429 5.322 5.217 5.114 5.012 4.912 4.813 4.717 4.622 4.529 4.437 4.347 4.259 4.172 4.087 4.003 3.922 3.841 3.762 3.685 3.609 3.534 3.461 3.39 3.319 3.251 3.183 3.117 3.052 2.988 2.926 2.865 2.805 2.746 2.689 2.633 2.577 2.523 2.47 2.419 2.368 2.318 2.269 2.221 2.175 2.129 2.084 2.04 1.997 1.955 1.913 1.873 1.833 1.795 1.757 1.719 1.683 1.647 1.612 1.578 1.545 1.512 1.48 1.449 1.418

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.202" PeakHeight="110.0" Num="3" Error="0.0">
-30.359 12.943 -3.071
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.202" EndFrequency="12.25" PeakHeight="384.269" Num="5" zHalfNm="289.327" Error="3.581">
-218.943 -65.098 11.957 6.375 -1.552
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.008" Depth="0.122"/>
<TopsideChapman PeakHeight="384.269" PeakDensity="1861817.6" PeakScaleHeight="72.504" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
