<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 14:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.01 (032) 14:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603202011440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.284" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.152" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="7.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.364" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.348" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="410.774" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.901" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.414" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="204.963" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.377" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="112.827" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="250.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="76">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 355.000 357.500 360.000 362.500 365.000 367.500 370.000 370.000 370.000 375.000 377.500 380.000 382.500 385.000 390.000 390.000 392.500 395.000 400.000 400.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 427.500 430.000 430.000 435.000 445.000 450.000 450.000 455.000 460.000 465.000 480.000 480.000 485.000 490.000 500.000 505.000 515.000 520.000 530.000 535.000 545.000 555.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 595.000 600.000 605.000 609.235 613.872 618.970 624.603 630.858 637.847 645.704 654.603 664.766 676.482 690.138 706.258 725.575 749.146 778.549
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 45 0 0 0 0 0 0 51 54 51 0 51 0 60 54 60 0 54 48 51 54 51 54 51 45 57 51 0 57 60 63 60 57 54 57 57 54 45 60 57 57 60 60 63 57 54 51 51 54 54 48 0 48 54 57 57 57 57 57 57 57 57 54 51 0 48 48 48 0 42 0 0 0 0
</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 2.734375 0.390625 -1.171875 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 1.171875 -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 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.487 90.0 95.0 100.0 105.0 110.0 111.659 113.317 114.976 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.774 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.263 2.911 3.254 3.364 3.241 3.241 3.364 3.365 3.513 3.642 3.764 3.881 3.996 4.112 4.228 4.346 4.466 4.589 4.714 4.842 4.973 5.106 5.241 5.377 5.514 5.652 5.789 5.926 6.062 6.196 6.329 6.459 6.587 6.713 6.837 6.958 7.078 7.195 7.31 7.423 7.534 7.644 7.751 7.857 7.962 8.065 8.167 8.267 8.367 8.465 8.561 8.657 8.751 8.844 8.935 9.025 9.113 9.199 9.282 9.361 9.437 9.506 9.568 9.621 9.662 9.689 9.7 9.7 9.699 9.694 9.685 9.673 9.658 9.64 9.618 9.594 9.567 9.536 9.504 9.468 9.43 9.39 9.347 9.303 9.256 9.207 9.157 9.104 9.05 8.994 8.937 8.878 8.818 8.757 8.694 8.63 8.566 8.5 8.433 8.366 8.297 8.228 8.159 8.089 8.018 7.947 7.875 7.803 7.73 7.658 7.585 7.512 7.439 7.365 7.292 7.219 7.145 7.072 6.999 6.925 6.852 6.78 6.707 6.634 6.562 6.49 6.419 6.347 6.276 6.206 6.136 6.066 5.996 5.927 5.859 5.79 5.723 5.655 5.589 5.522 5.457 5.391 5.327 5.262 5.199 5.136 5.073 5.011 4.949 4.888 4.828 4.768 4.709 4.65 4.592 4.534 4.477 4.421 4.365 4.31 4.255 4.201 4.147 4.094 4.042 3.99 3.939 3.888 3.838 3.788 3.739 3.691 3.643 3.595 3.549 3.502 3.456 3.411 3.366 3.322 3.279 3.235 3.193 3.151 3.109 3.068

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.364" PeakHeight="110.0" Num="3" Error="0.0">
-30.482 13.123 -3.154
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.364" EndFrequency="9.7" PeakHeight="410.774" Num="5" zHalfNm="250.901" Error="6.67">
-266.086 -48.459 26.437 -12.309 4.619
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.976" Depth="0.123"/>
<TopsideChapman PeakHeight="410.774" PeakDensity="1167369.8" PeakScaleHeight="112.827" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
