<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-10 -283 01:00:00.000"
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="18.0">
<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 F2x cusp, F2 cusps do not match</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" >
2026.10.10 (283) 01:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628310100100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="4.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.818" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.962" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="410.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="410.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="442.204" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="376.484" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="323.241" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.154" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.351" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.473" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.720" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.830" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 410.000 410.000 411.250 411.968 412.788 413.731 414.828 416.120 417.664 419.543 421.876 424.854 428.786 434.216 442.204 455.112 479.511 543.055
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 63 0 0 0 0 60 0 0 0 0 0 0 63 60 60 0 54
</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 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 -1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="154">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.077 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.153 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.23 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.484 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.317 0.294 0.264 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.224 0.245 0.266 0.287 0.307 0.328 0.349 0.354 0.4 0.467 0.542 0.626 0.721 0.826 0.943 1.07 1.208 1.355 1.511 1.674 1.843 2.017 2.196 2.379 2.565 2.752 2.941 3.131 3.319 3.504 3.685 3.859 4.024 4.175 4.31 4.424 4.513 4.572 4.599 4.6 4.597 4.58 4.552 4.512 4.462 4.404 4.337 4.264 4.185 4.101 4.013 3.922 3.828 3.732 3.634 3.536 3.437 3.338 3.24 3.142 3.045 2.95 2.855 2.763 2.672 2.583 2.495 2.41 2.327 2.246 2.168 2.091 2.017 1.944 1.874 1.807 1.741 1.677 1.616 1.556 1.499 1.443 1.389 1.338 1.287 1.239 1.193 1.148 1.104 1.063 1.022 0.984 0.946 0.91 0.876 0.842 0.81 0.779 0.75 0.721 0.693 0.667 0.641 0.617 0.593 0.57 0.549 0.527 0.507 0.488 0.469 0.451 0.434 0.417 0.401 0.385 0.371 0.356 0.343 0.329 0.317 0.305 0.293 0.282 0.271 0.26 0.25 0.241 0.231 0.222 0.214 0.206

</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="4.6" PeakHeight="376.484" Num="5" zHalfNm="323.241" Error="2.389">
-149.61 -9.183 5.408 -2.538 0.669
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.23" Depth="0.154"/>
<TopsideChapman PeakHeight="376.484" PeakDensity="262531.03" PeakScaleHeight="39.72" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
