<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 22:20:00.000"
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 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" >
2026.10.29 (302) 22:20:00</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">
FF202630210292220009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.771" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.636" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.993" 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="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="378.974" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="325.838" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.286" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.791" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.705" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.529" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 425.000 425.000 430.000 430.349 430.737 431.172 431.663 432.220 432.859 433.600 434.467 435.498 436.742 438.273 440.206 442.720 446.124 450.993 458.533 471.770 501.081
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 69 69 0 0 63 0 60 0 57 0 57 0 0 0 0 0 0 51 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 1.171875 -0.390625 1.171875 -2.734375 0.390625 -1.953125 -0.390625 -1.953125 -1.171875 -1.171875 -1.953125 -0.390625 1.953125 -1.171875 -0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="150">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.983 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.966 180.0 185.0 190.0 195.0 200.0 205.0 208.949 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.974 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.307 0.276 0.234 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.219 0.242 0.266 0.289 0.312 0.336 0.354 0.367 0.428 0.488 0.553 0.624 0.703 0.792 0.891 1.0 1.116 1.239 1.366 1.495 1.626 1.757 1.889 2.02 2.152 2.283 2.415 2.547 2.68 2.813 2.947 3.082 3.218 3.355 3.492 3.629 3.765 3.895 4.015 4.116 4.182 4.2 4.2 4.19 4.168 4.135 4.092 4.04 3.98 3.912 3.839 3.761 3.679 3.594 3.505 3.415 3.324 3.231 3.138 3.045 2.952 2.86 2.769 2.679 2.591 2.504 2.419 2.335 2.254 2.174 2.097 2.022 1.948 1.877 1.808 1.741 1.677 1.614 1.553 1.495 1.438 1.383 1.33 1.279 1.23 1.183 1.137 1.093 1.051 1.01 0.971 0.933 0.896 0.861 0.828 0.795 0.764 0.734 0.705 0.677 0.651 0.625 0.6 0.577 0.554 0.532 0.511 0.491 0.471 0.453 0.435 0.418 0.401 0.385 0.37 0.355 0.341 0.328 0.315 0.302 0.29 0.279 0.268 0.257 0.247 0.237 0.228 0.219 0.21 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="4.2" PeakHeight="378.974" Num="5" zHalfNm="325.838" Error="3.589">
-153.969 -28.106 18.243 -9.04 2.847
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.949" Depth="0.154"/>
<TopsideChapman PeakHeight="378.974" PeakDensity="218858.56" PeakScaleHeight="38.529" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
