<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-28 -059 22:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.02.28 (059) 22:50:00</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">
FF202605902282250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.498" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.602" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="557.336" 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="6.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="448.595" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="384.555" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.533" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.508" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.213" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.179" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="103.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 427.500 430.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 442.500 445.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 457.500 460.000 460.000 460.000 465.000 465.000 465.000 467.500 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 481.667 483.333 485.000 483.333 481.667 480.000 485.000 490.000 495.000 485.000 495.000 495.000 495.000 490.000 500.000 502.500 505.000 505.000 505.000 505.000 505.000 505.000 510.000 515.000 515.000 515.000 515.000 520.000 525.000 525.000 527.500 530.000 535.000 535.000 535.000 537.500 540.000 535.000 542.500 550.000 550.000 550.000 550.657 551.524 552.722 554.485 557.336 562.728 576.799
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 60 69 57 63 66 69 66 63 69 72 0 60 66 66 69 69 63 72 72 75 66 54 63 60 66 66 72 69 60 69 72 75 66 0 75 63 0 69 69 57 63 0 63 69 63 66 54 0 63 60 60 66 60 0 57 57 57 66 0 66 57 66 60 0 60 60 57 54 0 51 48 48 57 48 57 54 0 51 48 54 54 60 0 0 54 51 51
</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 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.213 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.427 180.0 185.0 190.0 195.0 200.0 205.0 209.64 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 448.595 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</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 0.329 0.307 0.277 0.236 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.217 0.24 0.263 0.286 0.309 0.332 0.354 0.359 0.425 0.492 0.563 0.643 0.732 0.833 0.948 1.078 1.226 1.391 1.573 1.771 1.981 2.201 2.43 2.666 2.907 3.152 3.401 3.654 3.91 4.169 4.43 4.695 4.963 5.235 5.51 5.788 6.07 6.355 6.645 6.938 7.235 7.536 7.841 8.149 8.46 8.772 9.085 9.397 9.704 10.003 10.285 10.543 10.763 10.93 11.028 11.05 11.049 11.031 10.99 10.929 10.849 10.752 10.64 10.513 10.374 10.223 10.063 9.895 9.719 9.537 9.349 9.158 8.963 8.767 8.568 8.368 8.168 7.969 7.77 7.572 7.376 7.181 6.989 6.8 6.613 6.429 6.248 6.071 5.897 5.726 5.559 5.396 5.236 5.081 4.928 4.78 4.635 4.494 4.357 4.223 4.093 3.966 3.843 3.724 3.607 3.495 3.385 3.278 3.175 3.075 2.977 2.883 2.791 2.702 2.616 2.533 2.452 2.373 2.297 2.224 2.152 2.083 2.016 1.951 1.888 1.827 1.768 1.711 1.656 1.603 1.551 1.501 1.452 1.405 1.359 1.315 1.273 1.231 1.192 1.153 1.115 1.079 1.044 1.01 0.978 0.946 0.915 0.885 0.857 0.829 0.802 0.776 0.75 0.726 0.702 0.68 0.657 0.636 0.615 0.595 0.576 0.557 0.539 0.522 0.505 0.488 0.472

</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="11.05" PeakHeight="448.595" Num="5" zHalfNm="384.555" Error="4.338">
-224.446 -30.375 25.428 -13.844 4.282
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="99.64" Depth="0.154"/>
<TopsideChapman PeakHeight="448.595" PeakDensity="1514919.4" PeakScaleHeight="47.179" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
