<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 23:10:00.000"
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="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 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.24 (297) 23:10:00</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">
FF202629710242310009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.384" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.518" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.000" 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="4.250" 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="300.503" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.388" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.851" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="43.566" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.780" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.905" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="42.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="60">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.65 6.7 6.75 6.8 6.85 6.9 6.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 298.000 296.000 294.000 292.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 291.000 292.000 293.000 294.000 295.000 296.000 297.000 298.000 299.000 300.000 301.000 302.000 303.000 304.000 305.000 306.000 307.000 308.000 309.000 310.000 311.000 312.000 313.000 314.000 315.000 315.000 320.000 318.750 317.500 316.250 315.000 305.000 303.333 301.667 300.000 310.000 320.000 320.515 321.172 322.039 323.237 325.000 327.850 333.243 347.314 477.368
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 66 0 69 0 66 69 0 0 63 0 66 63 66 0 0 0 0 0 0 66 63 0 0 0 66 0 0 66 0 66 0 66 0 0 0 66 66 63 66 0 0 66 0 0 69 69 69 0 63 69 63 60 0 60 66 57 60 51
</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 1.953125 0.390625 1.171875 1.953125 1.171875 0.390625 1.171875 1.171875 -1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.953125 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 0.390625 1.953125 1.171875 1.171875 1.953125 2.734375 1.171875 -1.171875 1.171875 0.390625 0.390625 1.953125 1.953125 1.171875 2.734375 2.734375 1.171875 0.390625 1.953125 1.171875 1.171875 1.171875 1.171875 -1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="106">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.949 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.898 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.847 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.503 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0
</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 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.245 0.267 0.289 0.311 0.333 0.354 0.356 0.462 0.641 0.896 1.205 1.561 1.968 2.437 2.973 3.573 4.217 4.865 5.468 5.987 6.4 6.698 6.881 6.949 6.95 6.925 6.844 6.715 6.547 6.349 6.127 5.889 5.639 5.383 5.124 4.866 4.611 4.361 4.119 3.884 3.658 3.442 3.236 3.039 2.852 2.676 2.508 2.351 2.202 2.062 1.93 1.806 1.689 1.58 1.478 1.382 1.292 1.208 1.129 1.055 0.986 0.922 0.861 0.805 0.752 0.702 0.656 0.613 0.573 0.535 0.5 0.467 0.436 0.408 0.381 0.356 0.332 0.31 0.29 0.271 0.253 0.236 0.221 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="6.95" PeakHeight="300.503" Num="5" zHalfNm="270.388" Error="2.663">
-86.852 3.494 -2.547 1.362 -1.113
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.847" Depth="0.154"/>
<TopsideChapman PeakHeight="300.503" PeakDensity="599286.6" PeakScaleHeight="22.905" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
