<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 06:10:00.000"
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="12.0">
<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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 25% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace, 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" >
2026.10.21 (294) 06:10:00</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">
FF202629410210610009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.095" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.949" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="358.853" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="358.853" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="376.702" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="332.113" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="290.600" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.605" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="60.208" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.525" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.213" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="59.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
358.853 359.137 359.452 359.801 360.190 360.628 361.124 361.690 362.342 363.101 363.997 365.070 366.378 368.007 370.093 372.859 376.702 385.000 390.000 410.000 459.825
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -1.171875 -0.390625
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.055 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.111 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.166 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.113 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.251 0.201 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.221 0.243 0.265 0.287 0.309 0.331 0.353 0.354 0.448 0.563 0.698 0.856 1.04 1.25 1.487 1.75 2.038 2.347 2.674 3.014 3.363 3.714 4.06 4.395 4.711 4.999 5.253 5.466 5.63 5.741 5.795 5.8 5.795 5.766 5.712 5.637 5.543 5.434 5.311 5.178 5.036 4.888 4.735 4.579 4.421 4.262 4.104 3.947 3.792 3.64 3.491 3.345 3.203 3.065 2.931 2.802 2.677 2.557 2.441 2.33 2.223 2.12 2.021 1.927 1.837 1.75 1.667 1.588 1.513 1.441 1.372 1.306 1.244 1.184 1.127 1.073 1.021 0.971 0.925 0.88 0.837 0.797 0.758 0.721 0.686 0.653 0.621 0.591 0.562 0.535 0.509 0.484 0.46 0.438 0.417 0.396 0.377 0.359 0.341 0.324 0.309 0.294 0.279 0.266 0.253 0.24 0.229 0.217 0.207

</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="5.8" PeakHeight="332.113" Num="5" zHalfNm="290.6" Error="1.089">
-117.499 0.333 0.288 -0.18 0.111
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.166" Depth="0.154"/>
<TopsideChapman PeakHeight="332.113" PeakDensity="417369.72" PeakScaleHeight="31.213" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
