<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 08:00:00.000"
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="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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, F2x cusp not found, 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) 08:00:00</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">
FF202628810150800009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.107" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.641" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="650.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="650.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="676.224" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.452" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="516.286" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="399.125" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.882" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="169.048" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.768" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.269" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="172.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.900" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
650.000 657.385 666.012 676.224 688.500 703.537 722.385 746.703 779.277
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 57 0 0 57 63 60 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.953125 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.05 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.58 140.0 145.0 150.0 155.0 160.0 165.0 167.159 170.0 175.0 180.0 185.0 190.0 195.0 195.739 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 516.286 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.299 0.392 0.438 0.452 0.446 0.429 0.399 0.352 0.28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.225 0.269 0.313 0.357 0.401 0.445 0.452 0.487 0.527 0.568 0.609 0.652 0.696 0.742 0.79 0.841 0.894 0.95 1.009 1.071 1.136 1.204 1.275 1.348 1.425 1.505 1.587 1.671 1.758 1.847 1.937 2.029 2.123 2.218 2.313 2.41 2.507 2.605 2.704 2.802 2.901 3.0 3.099 3.198 3.296 3.394 3.491 3.588 3.683 3.778 3.872 3.964 4.054 4.143 4.229 4.313 4.395 4.473 4.549 4.62 4.687 4.75 4.808 4.861 4.908 4.949 4.983 5.011 5.031 5.044 5.05 5.05 5.049 5.045 5.038 5.028 5.016 5.0 4.982 4.962 4.939 4.915 4.888 4.859 4.828 4.795 4.761 4.726 4.688 4.65 4.61 4.569 4.527 4.484 4.44 4.396 4.35 4.304 4.257 4.21 4.163 4.114 4.066 4.017 3.968 3.919 3.87 3.821 3.771 3.722 3.672 3.623 3.574 3.525 3.476 3.427 3.379 3.331 3.283 3.235 3.188 3.141 3.094 3.048 3.002 2.957 2.912 2.867 2.823 2.78 2.736 2.694 2.651 2.609 2.568 2.527 2.487 2.447 2.407 2.369 2.33 2.292 2.255 2.218 2.182 2.146 2.11 2.075 2.041 2.007 1.973 1.94 1.908 1.876 1.844 1.813 1.783 1.752 1.723 1.694 1.665 1.636 1.608 1.581 1.554 1.527 1.501 1.475 1.45

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.452" PeakHeight="110.0" Num="3" Error="0.0">
-21.427 3.788 -0.311
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.452" EndFrequency="5.05" PeakHeight="516.286" Num="5" zHalfNm="399.125" Error="3.937">
-313.33 -13.256 8.401 -4.613 2.251
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="85.739" Depth="0.252"/>
<TopsideChapman PeakHeight="516.286" PeakDensity="316408.2" PeakScaleHeight="87.269" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
