<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 25% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace, Trace overlaps while constructing baseline</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" >
2026.10.28 (301) 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">
FF202630110282220009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.873" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.687" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.450" 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="88" Val="7.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="3.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="428.144" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="405.019" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.286" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="39.944" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.764" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.031" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="81">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 435.000 437.500 520.000 505.000 510.000 500.625 491.250 481.875 472.500 463.125 453.750 444.375 435.000 436.667 438.333 440.000 442.500 445.000 445.000 445.000 445.000 450.000 445.000 445.000 445.000 440.000 445.000 450.000 455.000 451.667 448.333 445.000 442.500 440.000 445.000 445.000 445.000 445.000 445.000 445.000 450.000 454.167 458.333 462.500 466.667 470.833 475.000 490.000 510.000 510.417 510.833 511.250 511.667 512.083 512.500 512.917 513.333 513.750 514.167 514.583 515.000 507.500 500.000 500.000 495.000 493.333 491.667 490.000 486.667 483.333 480.000 476.667 473.333 470.000 470.000 465.000 460.000 460.000 460.000 450.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 54 57 57 0 0 0 60 0 57 0 0 0 0 57 0 57 69 60 66 66 66 66 69 63 0 66 63 0 0 63 0 63 63 63 63 66 0 66 66 0 0 0 0 0 57 60 57 0 0 57 0 60 0 0 0 0 0 0 60 0 60 57 60 0 0 57 0 60 0 60 0 60 60 0 60 57 60 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 0.390625 0.390625 -0.390625 -1.171875 -0.390625 0.390625 -2.734375 2.734375 -0.390625 1.171875 -2.734375 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 1.171875 2.734375 0.390625 1.953125 1.953125 2.734375 1.171875 1.171875 1.171875 2.734375 0.390625 1.171875 0.390625 1.953125 1.171875 1.953125 -0.390625 1.953125 -0.390625 1.171875 1.953125 2.734375 -0.390625 1.171875 -0.390625 1.171875 -0.390625 -0.390625 0.390625 -1.953125 1.171875 0.390625 -0.390625 -1.953125 1.953125 1.171875 -2.734375 0.390625 -1.953125 -2.734375 -1.171875 -1.171875 0.390625 1.171875 -0.390625 -1.953125 -1.171875 1.953125 2.734375 -0.390625 2.734375 -1.953125 -1.953125 -0.390625 -1.953125 1.953125 -1.171875 -1.953125 -0.390625 -1.171875 1.953125 0.390625 1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="117">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.991 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.982 180.0 185.0 190.0 195.0 200.0 205.0 208.973 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 428.144 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0
</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 0.265 0.289 0.312 0.335 0.354 0.365 0.428 0.502 0.584 0.67 0.758 0.847 0.936 1.026 1.116 1.207 1.298 1.391 1.485 1.58 1.677 1.776 1.876 1.978 2.083 2.19 2.3 2.412 2.527 2.646 2.768 2.893 3.023 3.156 3.295 3.438 3.588 3.743 3.905 4.075 4.254 4.443 4.644 4.858 5.09 5.344 5.629 5.959 6.377 7.2 7.192 7.096 6.91 6.655 6.352 6.018 5.665 5.304 4.945 4.594 4.255 3.931 3.623 3.335 3.064 2.812 2.579 2.363 2.163 1.979 1.81 1.654 1.512 1.381 1.262 1.152 1.052 0.96 0.877 0.8 0.73 0.667 0.608 0.555 0.507 0.462 0.422 0.385 0.351 0.32 0.292 0.267 0.243 0.222 0.203

</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="7.2" PeakHeight="428.144" Num="5" zHalfNm="405.019" Error="22.908">
-154.709 -106.649 53.597 -11.41 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.973" Depth="0.154"/>
<TopsideChapman PeakHeight="428.144" PeakDensity="643176.2" PeakScaleHeight="17.031" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
