<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-09 -099 23:40:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, F2x cusp not found, 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" >
2026.04.09 (099) 23:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609904092340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="1.843" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.691" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="660.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="660.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="660.000" 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="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="647.322" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="504.096" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.159" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="209.069" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.018" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="106.642" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="213.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
670.000 660.000 672.857 685.714 698.571 711.429 724.286 737.143 750.000 764.375 778.750 793.125 807.500 821.875 836.250 850.625 865.000 865.000 879.000 893.000 907.000 919.796 933.535
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
12 12 0 0 0 0 0 0 9 0 0 0 0 0 0 0 9 12 0 0 0 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -1.953125 2.734375 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 -2.734375 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 1.171875 0.390625 0.390625 0.390625 2.734375 0.390625
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.495 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.99 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.485 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 647.322 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.313 0.288 0.254 0.206 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.217 0.239 0.261 0.282 0.304 0.326 0.348 0.354 0.378 0.409 0.439 0.469 0.499 0.53 0.562 0.594 0.628 0.662 0.699 0.736 0.776 0.816 0.859 0.904 0.95 0.999 1.049 1.102 1.157 1.214 1.273 1.334 1.397 1.462 1.529 1.598 1.669 1.741 1.815 1.89 1.967 2.045 2.125 2.205 2.287 2.369 2.452 2.536 2.621 2.707 2.793 2.88 2.967 3.054 3.142 3.231 3.319 3.408 3.497 3.586 3.674 3.763 3.852 3.941 4.029 4.117 4.205 4.292 4.378 4.464 4.549 4.632 4.715 4.796 4.876 4.955 5.031 5.105 5.177 5.247 5.313 5.377 5.437 5.494 5.547 5.595 5.639 5.678 5.712 5.741 5.764 5.782 5.794 5.799 5.8 5.8 5.797 5.792 5.785 5.776 5.764 5.75 5.735 5.717 5.698 5.676 5.653 5.629 5.603 5.575 5.546 5.516 5.484 5.451 5.417 5.382 5.346 5.309 5.271 5.232 5.192 5.152 5.11 5.069 5.026 4.983 4.94 4.896 4.852 4.807 4.762 4.717 4.671 4.626 4.58 4.534 4.487 4.441 4.395 4.348 4.302 4.255 4.209 4.163 4.116 4.07 4.024 3.978 3.933 3.887 3.842 3.797 3.752 3.707 3.663 3.619 3.575 3.531 3.488 3.445 3.402 3.36 3.318 3.276 3.234 3.193

</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="5.8" PeakHeight="647.322" Num="5" zHalfNm="504.096" Error="8.449">
-419.03 -24.176 15.728 -7.433 4.074
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.485" Depth="0.154"/>
<TopsideChapman PeakHeight="647.322" PeakDensity="417369.72" PeakScaleHeight="106.642" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
