<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 22:10:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.20 (079) 22:10:00</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">
FF202607903202210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.508" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.072" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="551.736" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="436.998" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="378.893" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.096" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.854" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.739" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="91.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="148">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 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" >
350.000 355.000 355.833 356.667 357.500 358.333 359.167 360.000 360.833 361.667 362.500 363.333 364.167 365.000 365.833 366.667 367.500 368.333 369.167 370.000 365.000 367.500 370.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 372.500 370.000 375.000 375.000 375.000 370.000 370.000 375.000 380.000 380.833 381.667 382.500 383.333 384.167 385.000 385.000 385.000 387.500 390.000 385.000 385.000 385.000 385.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.556 396.111 396.667 397.222 397.778 398.333 398.889 399.444 400.000 405.000 407.500 410.000 410.000 410.000 410.000 415.000 412.500 410.000 415.000 416.176 417.353 418.529 419.706 420.882 422.059 423.235 424.412 425.588 426.765 427.941 429.118 430.294 431.471 432.647 433.824 435.000 436.429 437.857 439.286 440.714 442.143 443.571 445.000 445.000 445.000 445.000 446.875 448.750 450.625 452.500 454.375 456.250 458.125 460.000 460.000 460.000 460.000 465.000 465.000 460.000 464.000 468.000 472.000 476.000 480.000 480.000 482.500 485.000 485.000 485.000 491.429 497.857 504.286 510.714 517.143 523.571 530.000 535.000 535.000 540.000 542.500 545.000 545.000 550.000 551.736 555.310 566.918
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 51 0 60 0 0 51 0 0 0 69 66 0 66 60 0 69 0 0 0 0 0 0 51 66 66 0 60 0 0 0 63 51 0 0 0 63 69 54 0 0 0 0 60 0 60 0 0 60 0 51 57 0 63 51 0 0 63 0 54 0 63 0 66 0 63 0 0 0 0 57 0 0 0 60 0 0 0 0 0 0 63 66 63 72 0 69 0 0 66 0 0 69 66 60 66 66 63 57 0 0 54 0 51 54 0 45 57 57 0 0 0 0 0 0 51 54 51 54 0 57 63 60 66 60 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 1.171875 1.171875 -2.734375 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -1.953125 -1.171875 -1.171875 -0.390625 -0.390625 -1.953125 -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 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -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 -1.171875 -1.171875 -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 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 1.953125 -1.953125 0.390625 1.171875 2.734375 1.171875 -2.734375 -2.734375 -2.734375 -2.734375 1.171875 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.953125
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.195 145.0 150.0 155.0 160.0 165.0 170.0 172.39 175.0 180.0 185.0 190.0 195.0 200.0 203.585 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 436.998 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.266 0.215 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.238 0.262 0.287 0.312 0.336 0.354 0.376 0.445 0.51 0.574 0.64 0.709 0.782 0.858 0.94 1.027 1.119 1.219 1.325 1.439 1.56 1.691 1.83 1.98 2.139 2.31 2.491 2.684 2.889 3.105 3.334 3.576 3.829 4.095 4.373 4.662 4.962 5.271 5.589 5.915 6.246 6.579 6.914 7.244 7.568 7.879 8.173 8.443 8.681 8.882 9.038 9.144 9.195 9.2 9.196 9.171 9.126 9.061 8.979 8.882 8.771 8.647 8.512 8.368 8.216 8.057 7.892 7.722 7.549 7.373 7.196 7.017 6.837 6.658 6.479 6.301 6.125 5.951 5.779 5.609 5.442 5.278 5.118 4.96 4.806 4.655 4.508 4.365 4.225 4.088 3.956 3.826 3.701 3.579 3.46 3.345 3.233 3.125 3.02 2.918 2.82 2.724 2.631 2.542 2.455 2.371 2.29 2.211 2.135 2.062 1.991 1.922 1.856 1.791 1.729 1.669 1.612 1.556 1.502 1.449 1.399 1.35 1.303 1.258 1.214 1.172 1.131 1.091 1.053 1.016 0.981 0.947 0.913 0.882 0.851 0.821 0.792 0.764 0.738 0.712 0.687 0.663 0.64 0.617 0.596 0.575 0.555 0.535 0.516 0.498 0.481 0.464 0.448 0.432 0.417 0.402 0.388 0.375 0.361 0.349 0.336 0.325 0.313 0.302 0.292 0.281 0.272

</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="9.2" PeakHeight="436.998" Num="5" zHalfNm="378.893" Error="5.552">
-208.071 -36.264 9.324 0.433 1.165
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.585" Depth="0.154"/>
<TopsideChapman PeakHeight="436.998" PeakDensity="1050124.1" PeakScaleHeight="43.739" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
