<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-23 -054 08:50:00.000"
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" >
2026.02.23 (054) 08:50:00</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">
FF202605402230850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.185" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.064" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="5.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="300.000" 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="0.771" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="302.183" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.763" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.973" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.241" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.476" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.454" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="68">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 225.000 230.000 231.667 233.333 235.000 230.000 231.000 232.000 233.000 234.000 235.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 260.000 260.000 260.000 260.000 265.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 283.333 286.667 290.000 290.000 300.000 300.000 300.000 305.000 310.000 314.583 319.698 325.442 331.940 339.350 347.878 357.799 369.484 383.449 400.434 421.538 448.465 484.011 533.103
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 60 60 0 0 51 63 0 0 0 0 69 60 0 66 66 63 57 60 0 60 60 60 69 69 0 0 69 69 63 66 69 63 63 54 0 69 69 69 72 72 72 72 66 57 0 69 60 66 72 72 69 72 69 69 69 69 69 69 69 69 66 60 72 0 54 45
</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 -2.734375 -0.390625 -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" >
90.606 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.597 135.0 140.0 145.0 150.0 155.0 157.195 160.0 165.0 170.0 175.0 180.0 180.792 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 302.183 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.512 0.668 0.746 0.771 0.759 0.722 0.657 0.552 0.436 0.436 0.436 0.436 0.436 0.436 0.436 0.476 0.547 0.618 0.689 0.76 0.771 0.866 1.006 1.185 1.415 1.723 2.163 2.819 3.594 4.199 4.632 4.958 5.215 5.425 5.6 5.746 5.869 5.973 6.059 6.131 6.189 6.234 6.267 6.289 6.299 6.3 6.299 6.289 6.271 6.245 6.211 6.171 6.124 6.071 6.012 5.949 5.881 5.81 5.734 5.655 5.574 5.49 5.403 5.315 5.225 5.135 5.043 4.95 4.857 4.763 4.67 4.576 4.483 4.39 4.297 4.206 4.114 4.024 3.935 3.847 3.759 3.673 3.589 3.505 3.423 3.342 3.262 3.184 3.107 3.031 2.957 2.885 2.814 2.744 2.676 2.609 2.543 2.479 2.417 2.355 2.296 2.237 2.18 2.124 2.069 2.016 1.964 1.913 1.864 1.815 1.768 1.722 1.677 1.633 1.59 1.549 1.508 1.468 1.43 1.392 1.355 1.32 1.285 1.251 1.218 1.186 1.154 1.124 1.094 1.065 1.036 1.009 0.982 0.956 0.93 0.906 0.882 0.858 0.835 0.813 0.791 0.77 0.75 0.73 0.71 0.691 0.673 0.655 0.637 0.62 0.604 0.587 0.572 0.556 0.542 0.527 0.513 0.499 0.486 0.473 0.46 0.448 0.436 0.424 0.413 0.402 0.391 0.381 0.37 0.36 0.351 0.341 0.332 0.323 0.315 0.306 0.298 0.29 0.282 0.275 0.267 0.26 0.253 0.246 0.24 0.233

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.771" PeakHeight="110.0" Num="3" Error="0.0">
-25.209 6.692 -0.877
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.771" EndFrequency="6.3" PeakHeight="302.183" Num="5" zHalfNm="227.763" Error="1.851">
-155.417 55.162 -26.684 6.645 -1.097
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.792" Depth="0.335"/>
<TopsideChapman PeakHeight="302.183" PeakDensity="492431.75" PeakScaleHeight="57.454" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
