<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 09:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.27 (058) 09:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605802270950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.168" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.136" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="340.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.949" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="284.211" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.007" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.827" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="82.633" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.606" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.346" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.210" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 245.000 245.000 245.000 245.000 245.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 246.667 248.333 250.000 250.000 250.000 255.000 255.000 252.500 250.000 255.000 255.000 255.000 255.000 255.000 260.000 257.500 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 265.000 266.667 268.333 270.000 271.250 272.500 273.750 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 286.667 288.333 290.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 335.000 340.000 340.000 340.000 350.000 350.000 355.000 360.000 365.000 375.000 381.267 390.000 403.012 424.467 466.529
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 66 66 60 57 54 63 54 0 63 63 66 66 69 72 63 57 66 0 0 66 63 63 57 0 0 60 72 0 0 66 69 69 0 69 72 0 69 69 66 63 60 0 0 66 63 0 0 63 0 0 0 0 69 0 0 0 0 0 0 0 66 66 0 0 0 0 0 69 54 0 63 69 69 72 66 69 54 63 69 69 69 69 75 72 66 72 69 69 75 69 72 72 69 75 69 66 75 66 66 69 69 69 69 69 66 75 72 69 60
</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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="167">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.775 90.0 95.0 100.0 105.0 110.0 115.0 118.496 120.0 125.0 126.992 130.0 135.0 135.488 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 284.211 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.219 1.306 1.688 1.886 1.949 1.904 1.816 1.816 1.816 1.816 1.863 1.941 1.949 2.083 2.22 2.354 2.489 2.628 2.774 2.929 3.095 3.275 3.471 3.686 3.924 4.188 4.478 4.793 5.13 5.48 5.833 6.18 6.512 6.824 7.111 7.371 7.601 7.799 7.963 8.092 8.183 8.236 8.25 8.25 8.237 8.207 8.16 8.097 8.021 7.932 7.832 7.723 7.604 7.478 7.345 7.206 7.063 6.916 6.767 6.614 6.461 6.306 6.151 5.995 5.841 5.687 5.534 5.383 5.233 5.086 4.941 4.798 4.658 4.52 4.385 4.253 4.124 3.998 3.875 3.754 3.637 3.523 3.412 3.304 3.199 3.096 2.997 2.9 2.807 2.715 2.627 2.541 2.458 2.378 2.3 2.224 2.151 2.079 2.011 1.944 1.879 1.817 1.756 1.698 1.641 1.586 1.533 1.482 1.433 1.385 1.338 1.293 1.25 1.208 1.167 1.128 1.09 1.053 1.018 0.984 0.95 0.918 0.887 0.857 0.829 0.801 0.774 0.747 0.722 0.698 0.674 0.651 0.629 0.608 0.588 0.568 0.549 0.53 0.512 0.495 0.478 0.462 0.446 0.431 0.416 0.402 0.389 0.376 0.363 0.351 0.339 0.327 0.316 0.306 0.295 0.285 0.276 0.266 0.257 0.248 0.24 0.232 0.224 0.216 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.949" PeakHeight="110.0" Num="3" Error="0.0">
-28.988 11.009 -2.246
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.949" EndFrequency="8.25" PeakHeight="284.211" Num="5" zHalfNm="225.007" Error="2.295">
-131.073 -14.084 -5.929 1.01 1.353
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.488" Depth="0.133"/>
<TopsideChapman PeakHeight="284.211" PeakDensity="844447.9" PeakScaleHeight="45.346" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
