<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 02:00:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.10.29 (302) 02:00:00</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">
FF202630210290200009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.588" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="39.645" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" 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="0.900" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="282.076" 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="3.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="270.278" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.451" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.439" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="40.021" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.135" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="20.040" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="42.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 200.000 205.000 210.000 210.000 220.000 225.000 230.000 232.500 235.000 265.000 210.000 218.333 226.667 235.000 245.000 255.000 260.000 260.000 260.000 261.250 262.500 263.750 265.000 265.000 265.000 265.000 265.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 257.778 255.556 253.333 251.111 248.889 246.667 244.444 242.222 240.000 250.000 260.000 270.000 270.000 270.000 270.000 272.500 275.000 272.500 270.000 270.000 270.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 268.333 266.667 265.000 270.000 275.000 275.083 275.167 275.250 275.333 275.417 275.500 275.583 275.667 275.750 275.833 275.917 276.000 276.083 276.167 276.250 276.333 276.417 276.500 276.583 276.667 276.750 276.833 276.917 277.000 277.083 277.167 277.250 277.333 277.417 277.500 277.583 277.667 277.750 277.833 277.917 278.000 278.083 278.167 278.250 278.333 278.417 278.500 278.583 278.667 278.750 278.833 278.917 279.000 279.083 279.167 279.250 279.333 279.417 279.500 279.583 279.667 279.750 279.833 279.917 280.000 282.076 284.365 286.901 289.729 292.899 296.480 300.556 305.237 310.670 317.050 324.649 333.854 345.233
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 0 78 0 69 0 69 0 66 0 0 0 0 66 66 0 69 0 0 0 66 0 66 0 60 69 0 0 63 0 0 0 69 0 0 0 0 0 0 0 0 0 0 0 63 0 0 0 0 0 0 75 69 69 72 0 69 0 69 0 66 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 0 60 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1.171875 1.171875 1.171875 1.171875 -0.390625 0.390625 -0.390625 0.390625 0.390625 1.953125 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 1.953125 -0.390625 1.953125 1.953125 1.953125 0.390625 2.734375 2.734375 0.390625 0.390625 2.734375 -1.953125 1.171875 2.734375 1.953125 1.171875 0.390625 1.171875 1.171875 -0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 2.734375 1.171875 2.734375 2.734375 1.171875 2.734375 2.734375 2.734375 -1.953125 2.734375 2.734375 2.734375 -1.171875 1.171875 2.734375 1.953125 1.171875 2.734375 1.953125 2.734375 1.171875 1.953125 -1.953125 1.171875 -1.953125 1.171875 1.953125 -1.953125 1.953125 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 -1.953125 2.734375 1.953125 1.953125 1.953125 -0.390625 0.390625 1.953125 2.734375 1.953125 1.953125 1.171875 1.953125 1.953125 1.953125 -0.390625 -0.390625 2.734375 1.953125 1.953125 1.953125 2.734375 -1.953125 -1.171875 -0.390625 2.734375 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 1.953125 -2.734375 -1.953125 2.734375 -1.953125 -1.953125 2.734375 -1.953125 -1.953125 2.734375 -1.953125 2.734375 2.734375 -1.953125 -1.953125 2.734375 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="98">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 131.0 135.0 140.0 145.0 150.0 152.0 155.0 160.0 165.0 170.0 173.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 270.278 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.348 0.331 0.299 0.247 0.233 0.233 0.233 0.233 0.233 0.233 0.25 0.279 0.308 0.337 0.354 0.421 0.623 0.883 1.206 1.591 2.033 2.527 3.07 3.66 4.295 4.974 5.695 6.456 7.251 8.068 8.888 9.674 10.361 10.854 11.049 11.05 10.993 10.822 10.559 10.223 9.832 9.403 8.95 8.484 8.013 7.546 7.088 6.643 6.214 5.803 5.412 5.041 4.691 4.362 4.052 3.763 3.492 3.239 3.003 2.783 2.579 2.389 2.212 2.049 1.897 1.756 1.625 1.504 1.392 1.288 1.192 1.103 1.021 0.944 0.874 0.808 0.748 0.692 0.64 0.592 0.548 0.507 0.469 0.433 0.401 0.371 0.343 0.317 0.294 0.272 0.251 0.232 0.215

</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="11.05" PeakHeight="270.278" Num="5" zHalfNm="243.451" Error="2.313">
-93.065 -9.758 7.659 -2.617 0.503
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="63.0" Depth="0.121"/>
<TopsideChapman PeakHeight="270.278" PeakDensity="1514919.4" PeakScaleHeight="20.04" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
