<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 13:50:00.000"
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" >
2026.03.13 (072) 13:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607203131350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.478" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.116" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="526.663" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.346" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.340" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="387.378" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.339" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.610" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.015" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.199" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.192" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.800" 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="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 295.000 295.000 295.000 295.000 300.000 305.000 302.500 300.000 305.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 318.333 321.667 325.000 328.333 331.667 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 455.000 455.000 460.000 462.000 464.000 466.000 468.000 470.000 465.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 475.000 475.000 475.000 480.000 480.000 480.000 480.000 480.000 482.500 485.000 485.000 485.000 485.000 485.000 490.000 490.000 490.000 490.000 490.000 495.000 500.000 500.000 500.000 502.500 505.000 505.000 507.500 510.000 512.500 515.000 517.501 520.250 523.288 526.663 530.432 534.671 539.473 544.956 551.279 558.650 567.352 577.782 590.512 606.396 626.773 653.864
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 48 0 48 45 0 0 0 54 0 51 57 57 0 57 60 57 48 0 54 0 0 0 54 60 57 63 57 63 60 66 60 48 60 51 60 57 60 57 63 63 63 48 60 54 63 57 63 60 63 63 60 66 63 66 63 57 66 63 66 60 63 60 63 60 51 57 48 63 63 0 0 0 0 57 60 54 48 60 60 57 57 60 57 57 54 57 57 57 57 54 0 54 54 54 51 54 51 0 48 48 45 0 48 0 51 0 45 48 0 0 0 42 0 0 0 0 0 0 0 0 0 0 0 0 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 -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 -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 2.734375 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.953125 -0.390625 -0.390625 -1.953125 -2.734375 0.390625 -1.953125 -2.734375 -1.953125 1.171875 2.734375 1.953125 0.390625 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" >
89.491 90.0 95.0 100.0 105.0 110.0 111.73 113.46 115.0 115.19 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 387.378 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.251 2.896 3.237 3.346 3.223 3.223 3.332 3.346 3.486 3.632 3.778 3.924 4.069 4.214 4.359 4.503 4.648 4.792 4.935 5.079 5.224 5.368 5.513 5.658 5.804 5.95 6.097 6.246 6.395 6.545 6.696 6.849 7.003 7.159 7.316 7.475 7.635 7.798 7.962 8.129 8.297 8.468 8.64 8.816 8.993 9.173 9.355 9.539 9.725 9.913 10.102 10.292 10.482 10.671 10.856 11.037 11.208 11.367 11.507 11.621 11.703 11.745 11.75 11.749 11.739 11.721 11.694 11.66 11.618 11.568 11.512 11.449 11.38 11.305 11.225 11.139 11.049 10.955 10.857 10.755 10.649 10.54 10.429 10.315 10.198 10.08 9.959 9.837 9.714 9.589 9.463 9.337 9.209 9.082 8.954 8.825 8.697 8.569 8.441 8.313 8.186 8.059 7.933 7.807 7.683 7.559 7.436 7.314 7.193 7.073 6.954 6.837 6.72 6.605 6.491 6.379 6.268 6.158 6.049 5.942 5.837 5.733 5.63 5.528 5.428 5.33 5.233 5.137 5.043 4.95 4.859 4.769 4.681 4.594 4.508 4.424 4.341 4.26 4.18 4.101 4.023 3.947 3.872 3.799 3.727 3.656 3.586 3.518 3.45 3.384 3.319 3.255 3.193 3.131 3.071 3.012 2.954 2.897 2.841 2.786 2.732 2.679 2.627 2.576 2.526 2.476 2.428 2.381 2.335 2.289 2.244 2.201 2.158 2.115 2.074 2.033 1.994 1.955 1.916 1.879 1.842 1.806 1.77 1.736 1.702 1.668

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.346" PeakHeight="110.0" Num="3" Error="0.0">
-30.469 13.105 -3.145
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.346" EndFrequency="11.75" PeakHeight="387.378" Num="5" zHalfNm="280.339" Error="3.248">
-221.366 -69.985 20.9 -1.392 -0.345
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.19" Depth="0.123"/>
<TopsideChapman PeakHeight="387.378" PeakDensity="1712934.2" PeakScaleHeight="78.192" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
