<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 23:20:00.000"
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 44 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Severe F-spread, F2x cusp not found, 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) 23:20:00</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">
FF202630210292320009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.079" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.934" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="366.973" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="328.117" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.130" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.789" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.103" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.626" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.267" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="74">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0 2.05 2.1 2.15 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 275.000 280.000 275.000 280.000 282.500 285.000 287.500 290.000 292.500 295.000 285.000 275.000 277.500 280.000 278.750 277.500 276.250 275.000 275.000 278.333 281.667 285.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.833 281.667 282.500 283.333 284.167 285.000 290.833 296.667 302.500 308.333 314.167 316.111 318.056 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 328.000 330.388 333.059 336.068 339.482 343.390 347.907 353.188 359.444 366.973 376.206 387.797 402.781 422.904 451.357 494.659
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 60 0 0 0 66 0 0 66 60 0 66 0 63 0 69 0 63 63 72 0 0 66 63 0 0 0 63 66 63 0 66 63 66 0 0 60 0 63 0 63 54 0 66 57 0 66 57 0 0 69 63 66 63 63 0 60 57 0 0 0 0 0 0 60 57 0 57 54 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 -1.953125 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.953125 1.171875 1.171875 1.953125 0.390625 -0.390625 1.171875 1.953125 1.171875 1.171875 -0.390625 1.953125 1.171875 1.171875 0.390625 1.171875 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.953125 0.390625 2.734375 1.171875 1.953125 0.390625 0.390625 0.390625 1.171875 -1.953125 -1.171875 0.390625 -0.390625 -1.171875 -1.953125 -1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="158">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.199 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.397 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.596 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.117 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</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 0.313 0.287 0.252 0.202 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.242 0.264 0.286 0.308 0.33 0.351 0.354 0.417 0.532 0.699 0.899 1.124 1.385 1.7 2.095 2.598 3.171 3.697 4.117 4.442 4.697 4.901 5.064 5.195 5.299 5.379 5.437 5.476 5.497 5.5 5.499 5.487 5.462 5.425 5.377 5.32 5.254 5.18 5.1 5.013 4.922 4.826 4.727 4.625 4.52 4.414 4.307 4.198 4.09 3.981 3.873 3.766 3.66 3.554 3.45 3.348 3.247 3.148 3.051 2.956 2.863 2.773 2.684 2.597 2.513 2.431 2.351 2.274 2.198 2.125 2.054 1.984 1.917 1.852 1.789 1.728 1.669 1.612 1.557 1.503 1.451 1.401 1.352 1.305 1.26 1.216 1.174 1.133 1.093 1.055 1.018 0.982 0.948 0.915 0.883 0.852 0.822 0.793 0.765 0.738 0.712 0.687 0.663 0.639 0.617 0.595 0.574 0.554 0.534 0.515 0.497 0.479 0.462 0.446 0.43 0.415 0.4 0.386 0.372 0.359 0.347 0.334 0.322 0.311 0.3 0.289 0.279 0.269 0.26 0.25 0.242 0.233 0.225 0.217 0.209 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="5.5" PeakHeight="328.117" Num="5" zHalfNm="272.13" Error="3.561">
-135.005 37.439 -20.689 8.717 -2.983
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.596" Depth="0.154"/>
<TopsideChapman PeakHeight="328.117" PeakDensity="375310.2" PeakScaleHeight="43.267" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
