<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 01:20:00.000"
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="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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.01.26 (026) 01:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602601260120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.993" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.757" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="6.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="411.833" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="337.711" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.961" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.907" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.968" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.843" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.723" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="58.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.950" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="55">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 320.000 320.000 320.000 320.000 315.000 315.000 320.000 320.000 320.000 321.667 323.333 325.000 330.000 335.000 335.000 335.000 335.000 335.000 332.500 330.000 330.000 332.500 335.000 340.000 340.000 340.000 341.667 343.333 345.000 347.500 350.000 355.000 360.000 365.000 365.000 370.000 375.000 380.000 385.000 384.706 384.412 384.118 383.824 383.529 383.235 387.744 392.757 398.363 404.675 411.833 420.022 429.479
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 57 0 0 66 54 57 57 63 60 60 0 0 57 66 63 0 0 0 57 0 57 54 0 51 57 0 57 0 0 54 54 57 60 57 54 54 0 0 54 51 0 0 0 54 0 0 48 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.171875 1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -0.390625 1.953125 -1.171875 -0.390625 -0.390625 -1.953125 -1.953125 -1.953125 0.390625 0.390625 -0.390625 -1.171875 -1.171875 2.734375 2.734375 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="130">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.729 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.458 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.187 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 337.711 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.293 0.261 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.227 0.248 0.269 0.29 0.311 0.332 0.353 0.354 0.465 0.589 0.731 0.898 1.094 1.324 1.586 1.88 2.201 2.545 2.907 3.282 3.666 4.054 4.44 4.821 5.188 5.535 5.851 6.126 6.348 6.505 6.588 6.6 6.596 6.563 6.5 6.409 6.295 6.162 6.014 5.852 5.68 5.501 5.316 5.129 4.939 4.75 4.562 4.376 4.192 4.013 3.838 3.668 3.502 3.342 3.188 3.039 2.895 2.758 2.625 2.499 2.377 2.261 2.15 2.044 1.943 1.847 1.755 1.667 1.584 1.504 1.428 1.357 1.288 1.223 1.161 1.102 1.046 0.993 0.943 0.895 0.849 0.806 0.765 0.726 0.689 0.654 0.62 0.589 0.559 0.53 0.503 0.477 0.453 0.43 0.408 0.387 0.367 0.348 0.331 0.314 0.298 0.282 0.268 0.254 0.241 0.229 0.217 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.6" PeakHeight="337.711" Num="5" zHalfNm="297.961" Error="1.771">
-116.675 -2.827 2.534 -1.314 0.758
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.187" Depth="0.154"/>
<TopsideChapman PeakHeight="337.711" PeakDensity="540446.6" PeakScaleHeight="29.723" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
