<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 21:20:00.000"
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="14.0">
<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" >
2026.10.27 (300) 21:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630010272120009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.087" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.921" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.550" 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="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="392.309" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.504" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="322.215" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="283.867" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.970" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.619" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.638" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.762" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="61.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="38">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 342.500 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.871 381.856 382.982 384.279 385.789 387.572 389.707 392.309 395.552 399.707
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 0 0 75 78 69 75 78 78 72 75 78 69 72 75 78 69 0 78 78 72 75 63 72 75 63 69 72 75 75 75 78 75 75 75 75 75 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="123">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.617 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.88 140.0 145.0 150.0 155.0 160.0 165.0 165.761 170.0 175.0 180.0 185.0 190.0 193.641 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.215 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.333 0.437 0.488 0.504 0.497 0.477 0.44 0.383 0.293 0.213 0.213 0.213 0.213 0.213 0.213 0.213 0.213 0.257 0.309 0.362 0.414 0.466 0.504 0.551 0.684 0.814 0.958 1.123 1.318 1.544 1.799 2.076 2.367 2.665 2.966 3.267 3.568 3.87 4.172 4.476 4.782 5.091 5.404 5.72 6.038 6.355 6.658 6.92 7.081 7.1 7.093 7.049 6.967 6.854 6.714 6.552 6.373 6.179 5.975 5.764 5.549 5.331 5.113 4.896 4.682 4.472 4.266 4.066 3.872 3.684 3.503 3.329 3.162 3.001 2.848 2.701 2.561 2.427 2.3 2.178 2.063 1.954 1.85 1.751 1.657 1.568 1.484 1.404 1.328 1.256 1.188 1.124 1.063 1.005 0.95 0.899 0.85 0.803 0.76 0.718 0.679 0.642 0.607 0.574 0.543 0.513 0.485 0.458 0.433 0.41 0.387 0.366 0.346 0.327 0.309 0.292 0.276 0.261 0.247 0.233 0.221 0.209

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.504" PeakHeight="110.0" Num="3" Error="0.0">
-22.369 4.391 -0.405
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.504" EndFrequency="7.1" PeakHeight="322.215" Num="5" zHalfNm="283.867" Error="2.973">
-116.395 -22.206 14.451 -7.281 2.857
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.641" Depth="0.291"/>
<TopsideChapman PeakHeight="322.215" PeakDensity="625434.25" PeakScaleHeight="27.762" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
