<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 20:40:00.000"
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" >
2026.02.04 (035) 20:40:00</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">
FF202603502042040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.557" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.038" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="521.243" 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="1.810" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.454" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="294.987" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.322" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.918" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.193" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.288" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="147.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 317.308 319.615 321.923 324.231 326.538 328.846 331.154 333.462 335.769 338.077 340.385 342.692 345.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 370.000 370.000 372.500 375.000 377.500 380.000 380.000 383.333 386.667 390.000 390.000 395.000 395.000 400.000 402.500 405.000 405.000 405.000 410.000 412.500 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 437.500 440.000 442.500 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 470.000 475.000 477.500 480.000 482.500 485.000 485.000 490.000 492.500 495.000 495.000 495.000 495.000 500.000 500.000 500.000 505.000 506.014 507.145 508.415 509.852 511.490 513.376 515.570 518.155 521.243 525.000 529.668 535.624 543.487 554.347
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 63 0 0 0 48 0 60 0 66 0 63 0 63 0 0 0 0 0 0 66 69 69 69 69 63 66 57 57 0 0 57 57 63 0 0 0 57 60 0 0 60 63 57 63 57 0 54 57 60 57 0 63 60 66 57 63 60 63 57 0 0 0 63 66 66 60 66 63 54 63 57 66 66 60 0 54 0 63 69 60 0 51 63 66 66 60 63 60 63 63 60 60 60 54 51 57 57 48 48 51 51 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 -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 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 1.171875 1.171875 -0.390625 -0.390625 -1.171875 -2.734375 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -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 -2.734375 -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 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 2.734375 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875
</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" >
89.818 90.0 95.0 100.0 105.0 110.0 115.0 119.295 120.0 125.0 128.591 130.0 135.0 137.886 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.454 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.212 1.568 1.752 1.81 1.771 1.673 1.673 1.673 1.673 1.694 1.767 1.81 1.888 2.044 2.184 2.319 2.452 2.585 2.72 2.858 2.999 3.143 3.29 3.44 3.593 3.748 3.906 4.065 4.225 4.386 4.547 4.709 4.871 5.033 5.194 5.356 5.518 5.679 5.84 6.001 6.162 6.324 6.485 6.647 6.81 6.973 7.138 7.303 7.471 7.639 7.81 7.983 8.158 8.336 8.516 8.699 8.882 9.062 9.228 9.356 9.4 9.4 9.392 9.372 9.34 9.298 9.245 9.183 9.112 9.033 8.947 8.854 8.754 8.649 8.539 8.425 8.307 8.185 8.06 7.932 7.803 7.671 7.539 7.405 7.27 7.135 7.0 6.864 6.729 6.595 6.461 6.328 6.196 6.065 5.935 5.806 5.679 5.554 5.43 5.308 5.188 5.07 4.953 4.839 4.726 4.615 4.506 4.4 4.295 4.192 4.091 3.993 3.896 3.801 3.708 3.618 3.529 3.442 3.357 3.274 3.192 3.113 3.035 2.959 2.885 2.813 2.742 2.673 2.605 2.539 2.475 2.412 2.351 2.291 2.233 2.176 2.121 2.066 2.014 1.962 1.912 1.863 1.815 1.769 1.723 1.679 1.636 1.594 1.553 1.513 1.474 1.436 1.399 1.363 1.327 1.293 1.26 1.227 1.195 1.164 1.134 1.105 1.076 1.049 1.021 0.995 0.969 0.944 0.92 0.896 0.873 0.85 0.828 0.806 0.785 0.765 0.745 0.726 0.707 0.689 0.671 0.653 0.636 0.62 0.604 0.588

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.81" PeakHeight="110.0" Num="3" Error="0.0">
-28.752 10.697 -2.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.81" EndFrequency="9.4" PeakHeight="379.454" Num="5" zHalfNm="294.987" Error="3.377">
-199.252 -68.848 34.196 -11.205 3.541
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.886" Depth="0.137"/>
<TopsideChapman PeakHeight="379.454" PeakDensity="1096277.9" PeakScaleHeight="59.288" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
