<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 22:50:00.000"
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 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.01 (060) 22:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.308" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.466" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="445.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="445.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="620.872" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="487.814" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="408.758" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.180" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="118.042" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.199" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.415" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="124.640" 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="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
445.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 460.000 460.000 475.000 475.000 475.000 480.000 481.667 483.333 485.000 485.000 490.000 490.000 490.000 495.000 495.000 495.000 495.000 500.000 500.000 500.000 505.000 506.667 508.333 510.000 510.000 512.500 515.000 515.000 530.000 533.333 536.667 540.000 545.000 545.000 550.000 555.000 555.000 555.000 560.000 560.000 560.000 570.000 570.000 570.000 570.000 570.000 570.000 575.000 575.000 580.000 582.500 583.870 585.390 587.087 588.992 591.148 593.606 596.435 599.726 603.602 608.235 613.870 620.872 629.806 641.600 657.891
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 66 66 0 69 66 60 66 60 66 57 60 63 60 0 0 69 72 78 69 72 69 72 72 72 63 66 69 66 0 0 66 72 0 66 66 60 57 66 66 60 66 63 57 66 72 69 72 69 63 72 72 72 66 60 60 63 60 0 51 60 0 57 57 0 51 57 63 60 57 57 57 54 57
</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 -1.171875 -1.171875 0.390625 0.390625 -1.171875 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 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 1.171875 1.171875 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -0.390625 0.390625
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.231 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.463 180.0 185.0 190.0 195.0 200.0 205.0 209.694 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 487.814 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.307 0.278 0.236 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.216 0.24 0.263 0.286 0.309 0.332 0.354 0.358 0.417 0.474 0.532 0.595 0.662 0.735 0.814 0.902 0.998 1.103 1.217 1.34 1.472 1.613 1.762 1.918 2.08 2.247 2.419 2.595 2.775 2.957 3.143 3.331 3.522 3.714 3.91 4.107 4.306 4.508 4.711 4.917 5.124 5.334 5.546 5.759 5.975 6.192 6.411 6.631 6.852 7.074 7.296 7.517 7.736 7.953 8.165 8.37 8.565 8.748 8.913 9.055 9.169 9.25 9.293 9.3 9.299 9.287 9.262 9.226 9.18 9.123 9.057 8.982 8.899 8.809 8.713 8.61 8.502 8.389 8.272 8.151 8.027 7.9 7.771 7.64 7.507 7.373 7.238 7.102 6.966 6.83 6.695 6.559 6.425 6.291 6.158 6.026 5.896 5.766 5.639 5.513 5.388 5.265 5.144 5.025 4.908 4.793 4.68 4.569 4.459 4.352 4.247 4.144 4.043 3.944 3.847 3.752 3.659 3.568 3.479 3.392 3.307 3.224 3.142 3.063 2.985 2.91 2.835 2.763 2.693 2.624 2.556 2.491 2.427 2.364 2.303 2.244 2.186 2.129 2.074 2.021 1.968 1.917 1.867 1.819 1.771 1.725 1.68 1.636 1.594 1.552 1.511 1.472 1.433 1.396 1.359 1.324 1.289 1.255 1.222 1.19 1.159 1.129 1.099 1.07 1.042 1.015 0.988

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.3" PeakHeight="487.814" Num="5" zHalfNm="408.758" Error="4.389">
-264.01 -30.54 24.624 -12.416 4.222
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="99.694" Depth="0.154"/>
<TopsideChapman PeakHeight="487.814" PeakDensity="1073076.9" PeakScaleHeight="58.415" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
