<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 00:20:00.000"
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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe 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" >
2026.10.23 (296) 00:20:00</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">
FF202629610230020009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.298" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.556" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="332.272" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="304.923" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.482" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.470" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="42.726" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.993" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.227" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="41.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 320.000 320.000 320.000 320.000 321.071 322.143 322.828 323.609 324.508 325.553 326.785 328.257 330.047 332.272 335.111 338.858 344.034 351.647 363.950 387.203 447.752
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 69 69 0 0 66 0 66 0 57 66 63 63 0 60 0 0 0 0 0 0 0 63 0 0 66 0 60 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.171875 0.390625 -0.390625 2.734375 1.953125 -0.390625 2.734375 1.171875 1.171875 1.953125 0.390625 2.734375 1.953125 1.953125 1.953125 1.171875 1.171875 1.953125 -1.171875 2.734375 0.390625 -1.171875 1.171875 -1.953125 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="107">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.493 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.987 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.48 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 304.923 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0
</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 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.23 0.251 0.272 0.293 0.314 0.335 0.354 0.366 0.515 0.719 0.984 1.312 1.71 2.181 2.728 3.346 4.018 4.719 5.415 6.068 6.644 7.117 7.466 7.68 7.75 7.75 7.712 7.609 7.452 7.251 7.015 6.754 6.476 6.186 5.889 5.592 5.297 5.006 4.723 4.449 4.185 3.932 3.691 3.461 3.243 3.036 2.841 2.658 2.485 2.322 2.169 2.026 1.892 1.766 1.648 1.538 1.435 1.338 1.249 1.165 1.086 1.013 0.944 0.881 0.821 0.766 0.714 0.665 0.62 0.578 0.539 0.503 0.469 0.437 0.407 0.38 0.354 0.33 0.307 0.287 0.267 0.249 0.232 0.216 0.202

</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="7.75" PeakHeight="304.923" Num="5" zHalfNm="275.482" Error="0.745">
-86.562 2.025 -1.216 0.586 -0.276
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.48" Depth="0.154"/>
<TopsideChapman PeakHeight="304.923" PeakDensity="745192.3" PeakScaleHeight="22.227" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
