<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 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="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 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" >
2026.10.29 (302) 01:20:00</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">
FF202630210290120009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.586" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="40.166" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="291.032" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="270.891" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.160" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.939" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="33.190" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.627" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.585" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="34.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="181">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 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 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 11.1 11.15 11.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 217.500 220.000 227.500 235.000 236.667 238.333 240.000 239.000 238.000 237.000 236.000 235.000 235.000 232.500 230.000 232.500 235.000 237.500 240.000 240.000 245.000 245.000 243.750 242.500 241.250 240.000 250.000 255.000 255.000 255.000 255.000 258.000 261.000 264.000 267.000 270.000 273.000 276.000 279.000 282.000 285.000 275.000 270.000 265.000 265.000 263.750 262.500 261.250 260.000 255.000 250.000 250.000 250.000 250.000 248.333 246.667 245.000 247.500 250.000 252.500 255.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 253.333 251.667 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 253.333 251.667 250.000 245.000 250.000 255.000 255.000 252.500 250.000 250.000 250.000 252.500 255.000 255.373 255.746 256.119 256.493 256.866 257.239 257.612 257.985 258.358 258.731 259.104 259.478 259.851 260.224 260.597 260.970 261.343 261.716 262.090 262.463 262.836 263.209 263.582 263.955 264.328 264.701 265.075 265.448 265.821 266.194 266.567 266.940 267.313 267.687 268.060 268.433 268.806 269.179 269.552 269.925 270.299 270.672 271.045 271.418 271.791 272.164 272.537 272.910 273.284 273.657 274.030 274.403 274.776 275.149 275.522 275.896 276.269 276.642 277.015 277.388 277.761 278.134 278.507 278.881 279.254 279.627 280.000 275.000 278.333 281.667 285.000 290.000 287.500 285.000 286.170 287.529 289.127 291.032 293.345 296.209 299.851 304.634 311.197 320.761 335.990 364.040
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 63 0 0 0 72 69 69 0 0 75 75 0 75 72 0 72 0 0 0 75 0 0 0 75 66 72 66 0 72 63 0 0 0 0 0 54 0 0 63 63 63 0 66 0 0 66 69 69 0 0 0 72 0 0 0 0 72 0 69 69 0 0 72 0 0 0 72 0 0 78 69 69 0 69 0 0 72 0 69 72 0 72 75 72 72 72 0 75 69 75 69 75 0 72 0 0 0 0 0 0 0 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 57 0 0 0 0 0 0 0 0 0 0 0 66 0 63 0 0 0 0 0 0 0 0 0 60 63 0 0 60 57 0 0 51 0 60 0 51 0 0 0 0 0 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 -1.171875 1.953125 -1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 1.953125 2.734375 1.953125 1.953125 -1.171875 1.953125 -0.390625 -1.171875 -1.171875 1.953125 1.953125 -0.390625 1.953125 2.734375 2.734375 1.953125 -0.390625 1.953125 2.734375 -2.734375 1.953125 2.734375 1.953125 -1.171875 2.734375 0.390625 -1.171875 2.734375 2.734375 2.734375 0.390625 2.734375 2.734375 1.171875 1.171875 1.953125 0.390625 2.734375 1.171875 1.171875 1.171875 1.171875 2.734375 1.953125 2.734375 2.734375 1.953125 2.734375 2.734375 2.734375 2.734375 1.171875 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 1.171875 1.953125 1.953125 1.953125 1.953125 -1.953125 2.734375 1.953125 1.953125 2.734375 2.734375 1.953125 2.734375 1.953125 1.953125 1.953125 2.734375 2.734375 1.953125 2.734375 2.734375 1.953125 2.734375 -1.953125 2.734375 1.953125 2.734375 -0.390625 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 0.390625 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 -0.390625 2.734375 2.734375 0.390625 -0.390625 2.734375 2.734375 0.390625 2.734375 1.953125 1.171875 2.734375 2.734375 2.734375 -0.390625 2.734375 1.953125 -0.390625 2.734375 0.390625 1.171875 0.390625 1.953125 2.734375 2.734375 -0.390625 1.953125 1.171875 2.734375 1.171875 0.390625 -1.953125 -2.734375 -1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="92">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.5 135.0 140.0 145.0 150.0 155.0 159.0 160.0 165.0 170.0 175.0 180.0 183.5 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 270.891 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.333 0.306 0.262 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.238 0.269 0.301 0.332 0.354 0.386 0.566 0.856 1.171 1.502 1.862 2.265 2.728 3.275 3.937 4.759 5.794 7.056 8.414 9.606 10.47 10.991 11.195 11.2 11.143 10.939 10.616 10.204 9.73 9.216 8.68 8.137 7.597 7.07 6.562 6.076 5.615 5.181 4.773 4.393 4.039 3.711 3.407 3.126 2.868 2.629 2.41 2.208 2.022 1.852 1.696 1.553 1.422 1.302 1.191 1.091 0.998 0.913 0.836 0.765 0.7 0.641 0.586 0.536 0.491 0.449 0.411 0.376 0.344 0.315 0.288 0.264 0.241 0.221 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="11.2" PeakHeight="270.891" Num="5" zHalfNm="248.16" Error="2.651">
-81.344 -7.571 -0.083 4.09 -2.483
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="73.5" Depth="0.154"/>
<TopsideChapman PeakHeight="270.891" PeakDensity="1556327.5" PeakScaleHeight="17.585" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
