<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 21:50:00.000"
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: 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" >
2026.03.10 (069) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606903102150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.425" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.314" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.437" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="441.036" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="368.532" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.936" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.077" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.474" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.084" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="119">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 366.250 367.500 368.750 370.000 371.250 372.500 373.750 375.000 377.000 379.000 381.000 383.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 387.000 389.000 391.000 393.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 412.000 414.000 416.000 418.000 420.000 420.000 420.000 420.000 425.000 426.250 427.500 428.750 430.000 431.250 432.500 433.750 435.000 440.000 440.000 440.000 445.000 446.250 447.500 448.750 450.000 450.000 455.000 455.000 457.143 459.286 461.429 463.571 465.714 467.857 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 545.000 545.000 550.000 554.621 559.781 565.582 572.149 579.647 588.287 598.352 610.227
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 72 57 72 72 66 54 57 0 72 0 0 0 0 0 0 51 0 0 66 0 0 0 0 54 0 66 0 66 54 69 0 0 69 0 66 0 72 60 75 72 0 75 0 0 0 0 0 69 69 0 63 0 54 60 63 66 69 60 0 54 0 0 54 0 0 69 60 66 69 57 0 0 0 60 63 60 63 0 60 0 0 66 0 69 63 69 60 69 63 69 63 72 63 69 66 66 69 63 66 66 60 0 0 60 60 60 60 60 63 63 63 60 63 63 63 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
92.206 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.796 140.0 145.0 150.0 155.0 160.0 165.0 167.592 170.0 175.0 180.0 185.0 190.0 195.0 196.388 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 441.036 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.289 0.379 0.423 0.437 0.432 0.416 0.387 0.344 0.277 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.261 0.302 0.343 0.384 0.426 0.437 0.495 0.572 0.65 0.732 0.819 0.912 1.011 1.118 1.232 1.354 1.485 1.623 1.77 1.925 2.088 2.258 2.436 2.622 2.814 3.012 3.217 3.428 3.645 3.867 4.095 4.327 4.564 4.805 5.05 5.299 5.551 5.806 6.063 6.322 6.582 6.841 7.099 7.355 7.606 7.85 8.085 8.308 8.515 8.702 8.866 9.001 9.104 9.171 9.199 9.2 9.195 9.176 9.143 9.098 9.04 8.972 8.893 8.805 8.709 8.605 8.494 8.378 8.255 8.128 7.998 7.863 7.726 7.586 7.444 7.301 7.157 7.012 6.867 6.722 6.577 6.433 6.289 6.147 6.005 5.865 5.727 5.59 5.456 5.323 5.192 5.063 4.936 4.812 4.689 4.57 4.452 4.337 4.224 4.113 4.005 3.899 3.796 3.695 3.596 3.499 3.405 3.313 3.223 3.135 3.05 2.967 2.885 2.806 2.729 2.654 2.58 2.509 2.44 2.372 2.306 2.242 2.179 2.118 2.059 2.002 1.946 1.891 1.838 1.787 1.736 1.688 1.64 1.594 1.549 1.505 1.463 1.422 1.381 1.342 1.304 1.268 1.232 1.197 1.163 1.13 1.098 1.067 1.037 1.007 0.979 0.951 0.924 0.898 0.872 0.848 0.823 0.8 0.777 0.755 0.734 0.713 0.693 0.673 0.654 0.635 0.617 0.6

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.437" PeakHeight="110.0" Num="3" Error="0.0">
-21.109 3.599 -0.284
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.437" EndFrequency="9.2" PeakHeight="441.036" Num="5" zHalfNm="368.532" Error="3.634">
-232.483 -23.966 14.712 -4.687 1.776
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="86.388" Depth="0.237"/>
<TopsideChapman PeakHeight="441.036" PeakDensity="1050124.1" PeakScaleHeight="54.084" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
