<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 15:00:00.000"
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" >
2026.02.07 (038) 15:00:00</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">
FF202603802071500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.363" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.921" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.381" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.356" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="394.960" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.868" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.491" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="181.010" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.484" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.536" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="226.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="86">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.45 9.5 9.55 9.6 9.65 9.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 345.000 348.333 351.667 355.000 360.000 365.000 365.000 370.000 372.500 375.000 380.000 380.000 380.000 382.000 384.000 386.000 388.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 407.500 410.000 410.000 412.727 415.455 418.182 420.909 423.636 426.364 429.091 431.818 434.545 437.273 440.000 440.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 470.000 470.000 475.000 480.000 480.000 485.000 490.000 505.000 505.000 510.000 515.000 520.000 525.000 535.000 535.000 540.000 545.000 550.000 555.000 560.000 575.000 575.000 580.000 587.255 595.462 604.824 615.602 628.144 642.920 660.588 682.087 708.815 742.944
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 51 0 0 45 51 51 48 48 0 48 48 48 51 0 0 0 0 48 48 0 48 57 57 54 57 54 45 54 57 0 54 45 0 0 0 0 0 0 48 0 48 0 54 63 63 60 66 63 57 60 63 60 60 60 63 63 0 63 54 66 63 57 54 51 54 54 54 51 54 54 60 51 60 60 63 57 51 57 42 51 45 0 51 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 -0.390625 2.734375 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 2.734375 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 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 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 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 1.171875 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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.59 113.18 114.77 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.96 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.275 2.926 3.271 3.381 3.258 3.258 3.381 3.388 3.537 3.672 3.8 3.922 4.042 4.16 4.277 4.393 4.509 4.626 4.743 4.861 4.98 5.099 5.219 5.341 5.463 5.586 5.711 5.836 5.962 6.089 6.216 6.345 6.474 6.603 6.732 6.862 6.992 7.123 7.253 7.383 7.513 7.642 7.771 7.899 8.026 8.152 8.277 8.401 8.522 8.642 8.759 8.873 8.983 9.089 9.191 9.286 9.374 9.455 9.526 9.586 9.635 9.671 9.693 9.7 9.7 9.698 9.691 9.68 9.665 9.646 9.624 9.597 9.568 9.534 9.498 9.458 9.416 9.37 9.322 9.272 9.219 9.163 9.106 9.046 8.984 8.921 8.856 8.789 8.721 8.651 8.58 8.508 8.435 8.361 8.285 8.209 8.133 8.055 7.977 7.898 7.819 7.739 7.659 7.579 7.499 7.418 7.338 7.257 7.176 7.095 7.015 6.934 6.854 6.774 6.694 6.614 6.535 6.456 6.377 6.299 6.221 6.144 6.067 5.99 5.914 5.839 5.764 5.69 5.616 5.543 5.471 5.399 5.327 5.257 5.187 5.117 5.049 4.981 4.913 4.847 4.781 4.715 4.651 4.587 4.523 4.461 4.399 4.338 4.277 4.218 4.158 4.1 4.042 3.985 3.929 3.873 3.818 3.764 3.71 3.657 3.605 3.553 3.502 3.452 3.402 3.353 3.305 3.257 3.21 3.163 3.117 3.072 3.027 2.983 2.94 2.897 2.854 2.813 2.771 2.731 2.691 2.651 2.612 2.574 2.536 2.498

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.381" PeakHeight="110.0" Num="3" Error="0.0">
-30.494 13.141 -3.163
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.381" EndFrequency="9.7" PeakHeight="394.96" Num="5" zHalfNm="254.868" Error="5.047">
-248.077 -45.53 13.832 -1.657 1.242
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.77" Depth="0.123"/>
<TopsideChapman PeakHeight="394.96" PeakDensity="1167369.8" PeakScaleHeight="102.536" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
