<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 18:10:00.000"
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="15.0">
<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" >
2026.10.15 (288) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628810151810009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.019" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.134" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="396.229" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.909" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.128" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="260.755" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="176.427" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.191" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="97.388" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.708" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.141" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="143.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 370.000 370.000 370.000 370.000 375.000 380.000 380.709 381.495 382.373 383.359 384.474 385.745 387.209 388.911 390.917 393.314 396.229 399.851 404.474 410.576 419.005
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 60 0 69 66 0 57 66 72 69 72 72 66 72 0 72 66 51 69 72 66 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="183">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.561 90.0 95.0 100.0 105.0 110.0 113.626 115.0 117.252 120.0 120.878 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 260.755 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.955 2.518 2.815 2.909 2.787 2.787 2.787 2.879 2.909 3.051 3.227 3.411 3.605 3.807 4.011 4.21 4.401 4.58 4.748 4.906 5.055 5.197 5.332 5.462 5.587 5.709 5.828 5.945 6.061 6.176 6.291 6.408 6.526 6.647 6.772 6.901 6.997 7.0 6.996 6.981 6.957 6.923 6.88 6.829 6.771 6.706 6.635 6.558 6.476 6.39 6.299 6.205 6.108 6.008 5.906 5.803 5.697 5.591 5.483 5.375 5.267 5.159 5.051 4.943 4.835 4.728 4.623 4.518 4.414 4.311 4.21 4.11 4.011 3.914 3.818 3.724 3.632 3.541 3.452 3.365 3.279 3.195 3.113 3.033 2.954 2.877 2.802 2.728 2.657 2.586 2.518 2.451 2.385 2.322 2.259 2.199 2.139 2.082 2.025 1.971 1.917 1.865 1.814 1.765 1.717 1.67 1.624 1.579 1.536 1.494 1.453 1.413 1.374 1.336 1.299 1.263 1.229 1.195 1.162 1.129 1.098 1.068 1.038 1.009 0.981 0.954 0.928 0.902 0.877 0.853 0.829 0.806 0.783 0.762 0.74 0.72 0.7 0.68 0.661 0.643 0.625 0.608 0.591 0.574 0.558 0.543 0.528 0.513 0.499 0.485 0.471 0.458 0.445 0.433 0.421 0.409 0.398 0.386 0.376 0.365 0.355 0.345 0.335 0.326 0.317 0.308 0.3 0.291 0.283 0.275 0.267 0.26 0.253 0.246 0.239 0.232 0.226 0.219 0.213 0.207 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.909" PeakHeight="110.0" Num="3" Error="0.0">
-30.118 12.589 -2.91
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.909" EndFrequency="7.0" PeakHeight="260.755" Num="5" zHalfNm="176.427" Error="3.234">
-115.311 -41.139 24.955 -10.516 2.134
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.878" Depth="0.122"/>
<TopsideChapman PeakHeight="260.755" PeakDensity="607940.44" PeakScaleHeight="55.141" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
